157788812 has 12 divisors (see below), whose sum is σ = 279233640. Its totient is φ = 78007776.

The previous prime is 157788731. The next prime is 157788817. The reversal of 157788812 is 218887751.

157788812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (157788817) 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, 221258 + ... + 221969.

It is an arithmetic number, because the mean of its divisors is an integer number (23269470).

Almost surely, 2^157788812 is an apocalyptic number.

It is an amenable number.

157788812 is a deficient number, since it is larger than the sum of its proper divisors (121444828).

157788812 is a wasteful number, since it uses less digits than its factorization.

157788812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443320 (or 443318 counting only the distinct ones).

The product of its digits is 250880, while the sum is 47.

The square root of 157788812 is about 12561.4016733802. The cubic root of 157788812 is about 540.3710435735.

The spelling of 157788812 in words is "one hundred fifty-seven million, seven hundred eighty-eight thousand, eight hundred twelve".