157740220 has 24 divisors (see below), whose sum is σ = 361369008. Its totient is φ = 57360000.

The previous prime is 157740173. The next prime is 157740269. The reversal of 157740220 is 22047751.

157740220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358281 + ... + 358720.

It is an arithmetic number, because the mean of its divisors is an integer number (15057042).

Almost surely, 2^157740220 is an apocalyptic number.

157740220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157740220 is an abundant number, since it is smaller than the sum of its proper divisors (203628788).

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

157740220 is a wasteful number, since it uses less digits than its factorization.

157740220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717021 (or 717019 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 157740220 is about 12559.4673453933. The cubic root of 157740220 is about 540.3155677231.

Adding to 157740220 its reverse (22047751), we get a palindrome (179787971).

The spelling of 157740220 in words is "one hundred fifty-seven million, seven hundred forty thousand, two hundred twenty".