156261738 has 32 divisors (see below), whose sum is σ = 329970240. Its totient is φ = 49332816.

The previous prime is 156261737. The next prime is 156261761. The reversal of 156261738 is 837162651.

It is a junction number, because it is equal to n+sod(n) for n = 156261696 and 156261705.

It is not an unprimeable number, because it can be changed into a prime (156261737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39256 + ... + 43052.

It is an arithmetic number, because the mean of its divisors is an integer number (10311570).

Almost surely, 2^156261738 is an apocalyptic number.

156261738 is an abundant number, since it is smaller than the sum of its proper divisors (173708502).

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

156261738 is an equidigital number, since it uses as much as digits as its factorization.

156261738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859 (or 3821 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 156261738 is about 12500.4695111824. The cubic root of 156261738 is about 538.6221595059.

The spelling of 156261738 in words is "one hundred fifty-six million, two hundred sixty-one thousand, seven hundred thirty-eight".