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7680020 = 225384001
BaseRepresentation
bin11101010011000000010100
3112110012000012
4131103000110
53431230040
6432335352
7122164505
oct35230024
915405005
107680020
114376127
1226a4558
13178b8ba
14103cbac
15a1a865
hex753014

7680020 has 12 divisors (see below), whose sum is σ = 16128084. Its totient is φ = 3072000.

The previous prime is 7680019. The next prime is 7680037. The reversal of 7680020 is 200867.

It can be written as a sum of positive squares in 2 ways, for example, as 5326864 + 2353156 = 2308^2 + 1534^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191981 + ... + 192020.

It is an arithmetic number, because the mean of its divisors is an integer number (1344007).

Almost surely, 27680020 is an apocalyptic number.

It is an amenable number.

7680020 is an abundant number, since it is smaller than the sum of its proper divisors (8448064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7680020 is a wasteful number, since it uses less digits than its factorization.

7680020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384010 (or 384008 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 7680020 is about 2771.2849005470. The cubic root of 7680020 is about 197.2971372110.

Adding to 7680020 its reverse (200867), we get a palindrome (7880887).

The spelling of 7680020 in words is "seven million, six hundred eighty thousand, twenty".

Divisors: 1 2 4 5 10 20 384001 768002 1536004 1920005 3840010 7680020