904003645 has 16 divisors (see below), whose sum is σ = 1155949488. Its totient is φ = 676316160.

The previous prime is 904003643. The next prime is 904003651. The reversal of 904003645 is 546300409.

It can be written as a sum of positive squares in 8 ways, for example, as 820836 + 903182809 = 906^2 + 30053^2 .

It is not a de Polignac number, because 904003645 - 2¹ = 904003643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904003643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20526 + ... + 47215.

It is an arithmetic number, because the mean of its divisors is an integer number (72246843).

Almost surely, 2^904003645 is an apocalyptic number.

It is an amenable number.

904003645 is a deficient number, since it is larger than the sum of its proper divisors (251945843).

904003645 is a wasteful number, since it uses less digits than its factorization.

904003645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67920.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 904003645 is about 30066.6533721331. The cubic root of 904003645 is about 966.9189249835.

The spelling of 904003645 in words is "nine hundred four million, three thousand, six hundred forty-five".