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7880485 = 51576097
BaseRepresentation
bin11110000011111100100101
3112211100222211
4132003330211
54004133420
6440523421
7123661114
oct36037445
915740884
107880485
1144a27a8
122780571
13182bc12
141091c7b
15a59e5a
hex783f25

7880485 has 4 divisors (see below), whose sum is σ = 9456588. Its totient is φ = 6304384.

The previous prime is 7880471. The next prime is 7880531. The reversal of 7880485 is 5840887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5840887 = 13449299.

It can be written as a sum of positive squares in 2 ways, for example, as 5377761 + 2502724 = 2319^2 + 1582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7880485 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788044 + ... + 788053.

It is an arithmetic number, because the mean of its divisors is an integer number (2364147).

Almost surely, 27880485 is an apocalyptic number.

It is an amenable number.

7880485 is a deficient number, since it is larger than the sum of its proper divisors (1576103).

7880485 is a wasteful number, since it uses less digits than its factorization.

7880485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576102.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 7880485 is about 2807.2201552425. The cubic root of 7880485 is about 198.9990404236. Note that the first 3 decimals are identical.

The spelling of 7880485 in words is "seven million, eight hundred eighty thousand, four hundred eighty-five".

Divisors: 1 5 1576097 7880485