157747920 has 80 divisors (see below), whose sum is σ = 533483712. Its totient is φ = 38241280.

The previous prime is 157747901. The next prime is 157747927. The reversal of 157747920 is 29747751.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157747927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27237 + ... + 32516.

Almost surely, 2^157747920 is an apocalyptic number.

157747920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157747920 is an abundant number, since it is smaller than the sum of its proper divisors (375735792).

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

157747920 is a wasteful number, since it uses less digits than its factorization.

157747920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59780 (or 59774 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 42.

The square root of 157747920 is about 12559.7738833149. The cubic root of 157747920 is about 540.3243593134.

The spelling of 157747920 in words is "one hundred fifty-seven million, seven hundred forty-seven thousand, nine hundred twenty".