120891492 has 36 divisors (see below), whose sum is σ = 309276240. Its totient is φ = 39810672.

The previous prime is 120891481. The next prime is 120891499. The reversal of 120891492 is 294198021.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×120891492² = 29229505675972128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (120891499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17242 + ... + 23217.

Almost surely, 2^120891492 is an apocalyptic number.

120891492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

120891492 is an abundant number, since it is smaller than the sum of its proper divisors (188384748).

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

120891492 is a wasteful number, since it uses less digits than its factorization.

120891492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40552 (or 40547 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 120891492 is about 10995.0667119395. The cubic root of 120891492 is about 494.4608516076.

The spelling of 120891492 in words is "one hundred twenty million, eight hundred ninety-one thousand, four hundred ninety-two".