905044404690 has 48 divisors (see below), whose sum is σ = 2376413648856. Its totient is φ = 238955616000.

The previous prime is 905044404683. The next prime is 905044404701. The reversal of 905044404690 is 96404440509.

It can be written as a sum of positive squares in 4 ways, for example, as 904589307801 + 455096889 = 951099^2 + 21333^2 .

It is a super-2 number, since 2×905044404690² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49773331 + ... + 49791510.

Almost surely, 2^905044404690 is an apocalyptic number.

905044404690 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

905044404690 is an abundant number, since it is smaller than the sum of its proper divisors (1471369244166).

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

905044404690 is a wasteful number, since it uses less digits than its factorization.

905044404690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99564955 (or 99564952 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 905044404690 in words is "nine hundred five billion, forty-four million, four hundred four thousand, six hundred ninety".