157720800 has 72 divisors (see below), whose sum is σ = 513389016. Its totient is φ = 42058240.

The previous prime is 157720799. The next prime is 157720841. The reversal of 157720800 is 8027751.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30459 + ... + 35258.

It is an arithmetic number, because the mean of its divisors is an integer number (7130403).

Almost surely, 2^157720800 is an apocalyptic number.

157720800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157720800 is an abundant number, since it is smaller than the sum of its proper divisors (355668216).

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

157720800 is a wasteful number, since it uses less digits than its factorization.

157720800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65740 (or 65727 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 157720800 is about 12558.6941996372. The cubic root of 157720800 is about 540.2933933764.

The spelling of 157720800 in words is "one hundred fifty-seven million, seven hundred twenty thousand, eight hundred".