157944538 has 4 divisors (see below), whose sum is σ = 236916810. Its totient is φ = 78972268.

The previous prime is 157944529. The next prime is 157944551. The reversal of 157944538 is 835449751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 109683729 + 48260809 = 10473^2 + 6947^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 39486133 + ... + 39486136.

Almost surely, 2^157944538 is an apocalyptic number.

157944538 is a deficient number, since it is larger than the sum of its proper divisors (78972272).

157944538 is an equidigital number, since it uses as much as digits as its factorization.

157944538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78972271.

The product of its digits is 604800, while the sum is 46.

The square root of 157944538 is about 12567.5987364333. The cubic root of 157944538 is about 540.5487540039.

The spelling of 157944538 in words is "one hundred fifty-seven million, nine hundred forty-four thousand, five hundred thirty-eight".