157420238 has 16 divisors (see below), whose sum is σ = 256120704. Its totient is φ = 72272640.

The previous prime is 157420231. The next prime is 157420247. The reversal of 157420238 is 832024751.

It is a super-2 number, since 2×157420238² = 49562262663953288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157420231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55070 + ... + 57857.

It is an arithmetic number, because the mean of its divisors is an integer number (16007544).

Almost surely, 2^157420238 is an apocalyptic number.

157420238 is a deficient number, since it is larger than the sum of its proper divisors (98700466).

157420238 is a wasteful number, since it uses less digits than its factorization.

157420238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112987.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 157420238 is about 12546.7222014357. The cubic root of 157420238 is about 539.9499702164.

Adding to 157420238 its reverse (832024751), we get a palindrome (989444989).

It can be divided in two parts, 1574 and 20238, that added together give a palindrome (21812).

The spelling of 157420238 in words is "one hundred fifty-seven million, four hundred twenty thousand, two hundred thirty-eight".