158631040 has 64 divisors (see below), whose sum is σ = 384678720. Its totient is φ = 62540800.

The previous prime is 158631037. The next prime is 158631041. The reversal of 158631040 is 40136851.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (158631041) 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, 43695 + ... + 47185.

It is an arithmetic number, because the mean of its divisors is an integer number (6010605).

Almost surely, 2^158631040 is an apocalyptic number.

158631040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158631040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192339360).

158631040 is an abundant number, since it is smaller than the sum of its proper divisors (226047680).

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

158631040 is an equidigital number, since it uses as much as digits as its factorization.

158631040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3569 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 158631040 is about 12594.8815000380. The cubic root of 158631040 is about 541.3307826379.

Adding to 158631040 its reverse (40136851), we get a palindrome (198767891).

The spelling of 158631040 in words is "one hundred fifty-eight million, six hundred thirty-one thousand, forty".