157993478 has 16 divisors (see below), whose sum is σ = 257714784. Its totient is φ = 72339840.

The previous prime is 157993411. The next prime is 157993487. The reversal of 157993478 is 874399751.

It is a congruent number.

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, 61538 + ... + 64053.

It is an arithmetic number, because the mean of its divisors is an integer number (16107174).

Almost surely, 2^157993478 is an apocalyptic number.

157993478 is a deficient number, since it is larger than the sum of its proper divisors (99721306).

157993478 is a wasteful number, since it uses less digits than its factorization.

157993478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125647.

The product of its digits is 1905120, while the sum is 53.

The square root of 157993478 is about 12569.5456560689. The cubic root of 157993478 is about 540.6045789250.

The spelling of 157993478 in words is "one hundred fifty-seven million, nine hundred ninety-three thousand, four hundred seventy-eight".