901991892 has 12 divisors (see below), whose sum is σ = 2104647776. Its totient is φ = 300663960.

The previous prime is 901991891. The next prime is 901991939. The reversal of 901991892 is 298199109.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901991891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37582984 + ... + 37583007.

Almost surely, 2^901991892 is an apocalyptic number.

It is an amenable number.

901991892 is an abundant number, since it is smaller than the sum of its proper divisors (1202655884).

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

901991892 is a wasteful number, since it uses less digits than its factorization.

901991892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75165998 (or 75165996 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 48.

The square root of 901991892 is about 30033.1798516241. The cubic root of 901991892 is about 966.2011377695.

The spelling of 901991892 in words is "nine hundred one million, nine hundred ninety-one thousand, eight hundred ninety-two".