157640704 has 96 divisors (see below), whose sum is σ = 352235520. Its totient is φ = 70041600.

The previous prime is 157640687. The next prime is 157640713. The reversal of 157640704 is 407046751.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 157640704.

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, 825249 + ... + 825439.

It is an arithmetic number, because the mean of its divisors is an integer number (3669120).

Almost surely, 2^157640704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157640704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176117760).

157640704 is an abundant number, since it is smaller than the sum of its proper divisors (194594816).

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

157640704 is a wasteful number, since it uses less digits than its factorization.

157640704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 157640704 is about 12555.5049281182. The cubic root of 157640704 is about 540.2019180874.

The spelling of 157640704 in words is "one hundred fifty-seven million, six hundred forty thousand, seven hundred four".