157720144 has 40 divisors (see below), whose sum is σ = 312355008. Its totient is φ = 77130240.

The previous prime is 157720139. The next prime is 157720151. The reversal of 157720144 is 441027751.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 178584 + ... + 179464.

Almost surely, 2^157720144 is an apocalyptic number.

It is an amenable number.

157720144 is a deficient number, since it is larger than the sum of its proper divisors (154634864).

157720144 is a wasteful number, since it uses less digits than its factorization.

157720144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 157720144 is about 12558.6680822450. The cubic root of 157720144 is about 540.2926443039.

Adding to 157720144 its reverse (441027751), we get a palindrome (598747895).

The spelling of 157720144 in words is "one hundred fifty-seven million, seven hundred twenty thousand, one hundred forty-four".