157838239 has 4 divisors (see below), whose sum is σ = 169979656. Its totient is φ = 145696824.

The previous prime is 157838237. The next prime is 157838269. The reversal of 157838239 is 932838751.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 157838239 - 2¹ = 157838237 is a prime.

It is a super-2 number, since 2×157838239² = 49825819381242242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157838231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6070689 + ... + 6070714.

It is an arithmetic number, because the mean of its divisors is an integer number (42494914).

Almost surely, 2^157838239 is an apocalyptic number.

157838239 is a deficient number, since it is larger than the sum of its proper divisors (12141417).

157838239 is a wasteful number, since it uses less digits than its factorization.

157838239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12141416.

The product of its digits is 362880, while the sum is 46.

The square root of 157838239 is about 12563.3689351225. The cubic root of 157838239 is about 540.4274610319.

The spelling of 157838239 in words is "one hundred fifty-seven million, eight hundred thirty-eight thousand, two hundred thirty-nine".