157445720 has 32 divisors (see below), whose sum is σ = 354741120. Its totient is φ = 62891520.

The previous prime is 157445713. The next prime is 157445731. The reversal of 157445720 is 27544751.

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, 32240 + ... + 36800.

It is an arithmetic number, because the mean of its divisors is an integer number (11085660).

Almost surely, 2^157445720 is an apocalyptic number.

157445720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157445720 is an abundant number, since it is smaller than the sum of its proper divisors (197295400).

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

157445720 is a wasteful number, since it uses less digits than its factorization.

157445720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435 (or 5431 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 157445720 is about 12547.7376446912. The cubic root of 157445720 is about 539.9791029865.

The spelling of 157445720 in words is "one hundred fifty-seven million, four hundred forty-five thousand, seven hundred twenty".