157439238 has 32 divisors (see below), whose sum is σ = 344027520. Its totient is φ = 47636160.

The previous prime is 157439207. The next prime is 157439239. The reversal of 157439238 is 832934751.

It is a super-2 number, since 2×157439238² = 49574227324041288, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 157439238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157439239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55306 + ... + 58082.

It is an arithmetic number, because the mean of its divisors is an integer number (10750860).

Almost surely, 2^157439238 is an apocalyptic number.

157439238 is an abundant number, since it is smaller than the sum of its proper divisors (186588282).

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

157439238 is a wasteful number, since it uses less digits than its factorization.

157439238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652.

The product of its digits is 181440, while the sum is 42.

The square root of 157439238 is about 12547.4793484588. The cubic root of 157439238 is about 539.9716926176.

The spelling of 157439238 in words is "one hundred fifty-seven million, four hundred thirty-nine thousand, two hundred thirty-eight".