158644940 has 12 divisors (see below), whose sum is σ = 333154416. Its totient is φ = 63457968.

The previous prime is 158644921. The next prime is 158644943. The reversal of 158644940 is 49446851.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (158644943) 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, 3966104 + ... + 3966143.

It is an arithmetic number, because the mean of its divisors is an integer number (27762868).

Almost surely, 2^158644940 is an apocalyptic number.

158644940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158644940 is an abundant number, since it is smaller than the sum of its proper divisors (174509476).

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

158644940 is a wasteful number, since it uses less digits than its factorization.

158644940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932256 (or 7932254 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 158644940 is about 12595.4332994145. The cubic root of 158644940 is about 541.3465934950.

The spelling of 158644940 in words is "one hundred fifty-eight million, six hundred forty-four thousand, nine hundred forty".