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9982405 = 51996481
BaseRepresentation
bin100110000101…
…000111000101
3200210011021201
4212011013011
510023414110
6553542501
7150564136
oct46050705
920704251
109982405
1156a8a24
123414a31
1320b6864
14147bc8d
15d22b3a
hex9851c5

9982405 has 4 divisors (see below), whose sum is σ = 11978892. Its totient is φ = 7985920.

The previous prime is 9982381. The next prime is 9982433. The reversal of 9982405 is 5042899.

It can be divided in two parts, 998 and 2405, that added together give a triangular number (3403 = T82).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5042899 = 16730197.

It can be written as a sum of positive squares in 2 ways, for example, as 6806881 + 3175524 = 2609^2 + 1782^2 .

It is not a de Polignac number, because 9982405 - 25 = 9982373 is a prime.

It is a Duffinian number.

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, 998236 + ... + 998245.

It is an arithmetic number, because the mean of its divisors is an integer number (2994723).

Almost surely, 29982405 is an apocalyptic number.

It is an amenable number.

9982405 is a deficient number, since it is larger than the sum of its proper divisors (1996487).

9982405 is a wasteful number, since it uses less digits than its factorization.

9982405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996486.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 9982405 is about 3159.4944215808. The cubic root of 9982405 is about 215.3170372274.

The spelling of 9982405 in words is "nine million, nine hundred eighty-two thousand, four hundred five".

Divisors: 1 5 1996481 9982405