157257770 has 32 divisors (see below), whose sum is σ = 296932608. Its totient is φ = 59894208.

The previous prime is 157257743. The next prime is 157257781. The reversal of 157257770 is 77752751.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 12869 + ... + 21911.

It is an arithmetic number, because the mean of its divisors is an integer number (9279144).

Almost surely, 2^157257770 is an apocalyptic number.

157257770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157257770 is a deficient number, since it is larger than the sum of its proper divisors (139674838).

157257770 is a wasteful number, since it uses less digits than its factorization.

157257770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9134.

The product of its (nonzero) digits is 120050, while the sum is 41.

The square root of 157257770 is about 12540.2460103460. The cubic root of 157257770 is about 539.7641516936.

The spelling of 157257770 in words is "one hundred fifty-seven million, two hundred fifty-seven thousand, seven hundred seventy".