158631240 has 32 divisors (see below), whose sum is σ = 475894080. Its totient is φ = 42301632.

The previous prime is 158631229. The next prime is 158631241. The reversal of 158631240 is 42136851.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 158631198 and 158631207.

It is not an unprimeable number, because it can be changed into a prime (158631241) 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, 660844 + ... + 661083.

It is an arithmetic number, because the mean of its divisors is an integer number (14871690).

Almost surely, 2^158631240 is an apocalyptic number.

158631240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158631240 is an abundant number, since it is smaller than the sum of its proper divisors (317262840).

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

158631240 is a wasteful number, since it uses less digits than its factorization.

158631240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321941 (or 1321937 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 158631240 is about 12594.8894397688. The cubic root of 158631240 is about 541.3310101388.

The spelling of 158631240 in words is "one hundred fifty-eight million, six hundred thirty-one thousand, two hundred forty".