157992420 has 24 divisors (see below), whose sum is σ = 442378944. Its totient is φ = 42131296.

The previous prime is 157992403. The next prime is 157992431. The reversal of 157992420 is 24299751.

157992420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1316544 + ... + 1316663.

It is an arithmetic number, because the mean of its divisors is an integer number (18432456).

Almost surely, 2^157992420 is an apocalyptic number.

157992420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157992420 is an abundant number, since it is smaller than the sum of its proper divisors (284386524).

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

157992420 is a wasteful number, since it uses less digits than its factorization.

157992420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633219 (or 2633217 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 157992420 is about 12569.5035701495. The cubic root of 157992420 is about 540.6033722066.

The spelling of 157992420 in words is "one hundred fifty-seven million, nine hundred ninety-two thousand, four hundred twenty".