909297090 has 80 divisors (see below), whose sum is σ = 2633106168. Its totient is φ = 223824384.

The previous prime is 909297083. The next prime is 909297113. The reversal of 909297090 is 90792909.

It can be written as a sum of positive squares in 4 ways, for example, as 784952289 + 124344801 = 28017^2 + 11151^2 .

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 39 ways as a sum of consecutive naturals, for example, 32647 + ... + 53706.

Almost surely, 2^909297090 is an apocalyptic number.

909297090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

909297090 is an abundant number, since it is smaller than the sum of its proper divisors (1723809078).

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

909297090 is a wasteful number, since it uses less digits than its factorization.

909297090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86385 (or 86376 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 909297090 is about 30154.5533875068. The cubic root of 909297090 is about 968.8025362282.

The spelling of 909297090 in words is "nine hundred nine million, two hundred ninety-seven thousand, ninety".