157489920 has 540 divisors, whose sum is σ = 676678464. Its totient is φ = 34836480.

The previous prime is 157489909. The next prime is 157489991. The reversal of 157489920 is 29984751.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5080305 + ... + 5080335.

Almost surely, 2^157489920 is an apocalyptic number.

157489920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338339232).

157489920 is an abundant number, since it is smaller than the sum of its proper divisors (519188544).

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

157489920 is an equidigital number, since it uses as much as digits as its factorization.

157489920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 157489920 is about 12549.4987947726. The cubic root of 157489920 is about 540.0296280040.

157489920 divided by its product of nonzero digits (181440) gives a palindrome (868).

The spelling of 157489920 in words is "one hundred fifty-seven million, four hundred eighty-nine thousand, nine hundred twenty".