156978834 has 16 divisors (see below), whose sum is σ = 314102880. Its totient is φ = 52302080.

The previous prime is 156978821. The next prime is 156978839. The reversal of 156978834 is 438879651.

156978834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (156978839) 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, 12274 + ... + 21554.

It is an arithmetic number, because the mean of its divisors is an integer number (19631430).

Almost surely, 2^156978834 is an apocalyptic number.

156978834 is an abundant number, since it is smaller than the sum of its proper divisors (157124046).

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

156978834 is a wasteful number, since it uses less digits than its factorization.

156978834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12105.

The product of its digits is 1451520, while the sum is 51.

The square root of 156978834 is about 12529.1194423232. The cubic root of 156978834 is about 539.4448272290. Note that the first 3 decimals are identical.

It can be divided in two parts, 15697 and 8834, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 156978834 in words is "one hundred fifty-six million, nine hundred seventy-eight thousand, eight hundred thirty-four".