157721884 has 12 divisors (see below), whose sum is σ = 279115200. Its totient is φ = 77974688.

The previous prime is 157721873. The next prime is 157721887. The reversal of 157721884 is 488127751.

It is a self number, because there is not a number n which added to its sum of digits gives 157721884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157721887) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 221164 + ... + 221875.

It is an arithmetic number, because the mean of its divisors is an integer number (23259600).

Almost surely, 2^157721884 is an apocalyptic number.

It is an amenable number.

157721884 is a deficient number, since it is larger than the sum of its proper divisors (121393316).

157721884 is a wasteful number, since it uses less digits than its factorization.

157721884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443132 (or 443130 counting only the distinct ones).

The product of its digits is 125440, while the sum is 43.

The square root of 157721884 is about 12558.7373569161. The cubic root of 157721884 is about 540.2946311685.

The spelling of 157721884 in words is "one hundred fifty-seven million, seven hundred twenty-one thousand, eight hundred eighty-four".