157729280 has 40 divisors (see below), whose sum is σ = 378186732. Its totient is φ = 63090688.

The previous prime is 157729259. The next prime is 157729283. The reversal of 157729280 is 82927751.

It can be written as a sum of positive squares in 2 ways, for example, as 127961344 + 29767936 = 11312^2 + 5456^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (157729283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28247 + ... + 33366.

Almost surely, 2^157729280 is an apocalyptic number.

157729280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157729280 is an abundant number, since it is smaller than the sum of its proper divisors (220457452).

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

157729280 is an frugal number, since it uses more digits than its factorization.

157729280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61636 (or 61620 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 157729280 is about 12559.0318098172. The cubic root of 157729280 is about 540.3030763222.

It can be divided in two parts, 15772 and 9280, that added together give a palindrome (25052).

The spelling of 157729280 in words is "one hundred fifty-seven million, seven hundred twenty-nine thousand, two hundred eighty".