157981632 has 28 divisors (see below), whose sum is σ = 417993576. Its totient is φ = 52660480.

The previous prime is 157981631. The next prime is 157981633. The reversal of 157981632 is 236189751.

It is an interprime number because it is at equal distance from previous prime (157981631) and next prime (157981633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157981631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411219 + ... + 411602.

It is an arithmetic number, because the mean of its divisors is an integer number (14928342).

Almost surely, 2^157981632 is an apocalyptic number.

157981632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157981632 is an abundant number, since it is smaller than the sum of its proper divisors (260011944).

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

157981632 is an equidigital number, since it uses as much as digits as its factorization.

157981632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822836 (or 822826 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 157981632 is about 12569.0744289307. The cubic root of 157981632 is about 540.5910674772.

The spelling of 157981632 in words is "one hundred fifty-seven million, nine hundred eighty-one thousand, six hundred thirty-two".