152331440 has 20 divisors (see below), whose sum is σ = 354170784. Its totient is φ = 60932544.

The previous prime is 152331433. The next prime is 152331463. The reversal of 152331440 is 44133251.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×152331440² = 46409735224947200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951992 + ... + 952151.

Almost surely, 2^152331440 is an apocalyptic number.

152331440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

152331440 is an abundant number, since it is smaller than the sum of its proper divisors (201839344).

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

152331440 is a wasteful number, since it uses less digits than its factorization.

152331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904156 (or 1904150 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 152331440 is about 12342.2623533937. The cubic root of 152331440 is about 534.0679494768.

Adding to 152331440 its reverse (44133251), we get a palindrome (196464691).

The spelling of 152331440 in words is "one hundred fifty-two million, three hundred thirty-one thousand, four hundred forty".