158157840 has 40 divisors (see below), whose sum is σ = 490290048. Its totient is φ = 42175360.

The previous prime is 158157833. The next prime is 158157841. The reversal of 158157840 is 48751851.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (158157841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329256 + ... + 329735.

Almost surely, 2^158157840 is an apocalyptic number.

158157840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158157840 is an abundant number, since it is smaller than the sum of its proper divisors (332132208).

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

158157840 is a wasteful number, since it uses less digits than its factorization.

158157840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659007 (or 659001 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 39.

The square root of 158157840 is about 12576.0820608010. The cubic root of 158157840 is about 540.7919791827.

The spelling of 158157840 in words is "one hundred fifty-eight million, one hundred fifty-seven thousand, eight hundred forty".