9001390920 has 64 divisors (see below), whose sum is σ = 27662826240. Its totient is φ = 2341824000.

The previous prime is 9001390901. The next prime is 9001390921. The reversal of 9001390920 is 290931009.

It is not an unprimeable number, because it can be changed into a prime (9001390921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 909856 + ... + 919695.

It is an arithmetic number, because the mean of its divisors is an integer number (432231660).

Almost surely, 2^9001390920 is an apocalyptic number.

It is an amenable number.

9001390920 is an abundant number, since it is smaller than the sum of its proper divisors (18661435320).

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

9001390920 is a wasteful number, since it uses less digits than its factorization.

9001390920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829606 (or 1829602 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 9001390920 is about 94875.6603139077. The cubic root of 9001390920 is about 2080.1909742059.

The spelling of 9001390920 in words is "nine billion, one million, three hundred ninety thousand, nine hundred twenty".