156538 has 16 divisors (see below), whose sum is σ = 254016. Its totient is φ = 72160.

The previous prime is 156521. The next prime is 156539. The reversal of 156538 is 835651.

It is a d-powerful number, because it can be written as 1 + 5⁷ + 5⁷ + 6² + 3⁵ + 8 .

It is not an unprimeable number, because it can be changed into a prime (156539) 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, 1845 + ... + 1927.

It is an arithmetic number, because the mean of its divisors is an integer number (15876).

2¹⁵⁶⁵³⁸ is an apocalyptic number.

156538 is a deficient number, since it is larger than the sum of its proper divisors (97478).

156538 is a wasteful number, since it uses less digits than its factorization.

156538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 3600, while the sum is 28.

The square root of 156538 is about 395.6488341952. The cubic root of 156538 is about 53.8939390566.

The spelling of 156538 in words is "one hundred fifty-six thousand, five hundred thirty-eight".