158399040 has 56 divisors (see below), whose sum is σ = 502920000. Its totient is φ = 42239488.

The previous prime is 158399039. The next prime is 158399041. The reversal of 158399040 is 40993851.

It is an interprime number because it is at equal distance from previous prime (158399039) and next prime (158399041).

It is a self number, because there is not a number n which added to its sum of digits gives 158399040.

It is not an unprimeable number, because it can be changed into a prime (158399041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81540 + ... + 83459.

Almost surely, 2^158399040 is an apocalyptic number.

158399040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158399040 is an abundant number, since it is smaller than the sum of its proper divisors (344520960).

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

158399040 is a wasteful number, since it uses less digits than its factorization.

158399040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165019 (or 165009 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 158399040 is about 12585.6680394805. The cubic root of 158399040 is about 541.0667527305.

The spelling of 158399040 in words is "one hundred fifty-eight million, three hundred ninety-nine thousand, forty".