149581992 has 64 divisors (see below), whose sum is σ = 434649600. Its totient is φ = 42010560.

The previous prime is 149581987. The next prime is 149582011. The reversal of 149581992 is 299185941.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2367 + ... + 17457.

It is an arithmetic number, because the mean of its divisors is an integer number (6791400).

Almost surely, 2^149581992 is an apocalyptic number.

149581992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149581992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217324800).

149581992 is an abundant number, since it is smaller than the sum of its proper divisors (285067608).

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

149581992 is a wasteful number, since it uses less digits than its factorization.

149581992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166 (or 15162 counting only the distinct ones).

The product of its digits is 233280, while the sum is 48.

The square root of 149581992 is about 12230.3717032640. The cubic root of 149581992 is about 530.8352700987.

The spelling of 149581992 in words is "one hundred forty-nine million, five hundred eighty-one thousand, nine hundred ninety-two".