156438138 has 8 divisors (see below), whose sum is σ = 312876288. Its totient is φ = 52146044.

The previous prime is 156438133. The next prime is 156438169. The reversal of 156438138 is 831834651.

156438138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

156438138 is an admirable number.

It is a super-3 number, since 3×156438138³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156438096 and 156438105.

It is not an unprimeable number, because it can be changed into a prime (156438133) 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, 13036506 + ... + 13036517.

It is an arithmetic number, because the mean of its divisors is an integer number (39109536).

Almost surely, 2^156438138 is an apocalyptic number.

156438138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

156438138 is a wasteful number, since it uses less digits than its factorization.

156438138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26073028.

The product of its digits is 69120, while the sum is 39.

The square root of 156438138 is about 12507.5232560248. The cubic root of 156438138 is about 538.8247623524.

The spelling of 156438138 in words is "one hundred fifty-six million, four hundred thirty-eight thousand, one hundred thirty-eight".