156436434 has 80 divisors (see below), whose sum is σ = 437063616. Its totient is φ = 40629600.

The previous prime is 156436429. The next prime is 156436439. The reversal of 156436434 is 434634651.

156436434 is a `hidden beast` number, since 1 + 5 + 6 + 4 + 3 + 643 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (156436429) and next prime (156436439).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (156436439) 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 39 ways as a sum of consecutive naturals, for example, 6204 + ... + 18744.

Almost surely, 2^156436434 is an apocalyptic number.

156436434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 156436434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218531808).

156436434 is an abundant number, since it is smaller than the sum of its proper divisors (280627182).

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

156436434 is a wasteful number, since it uses less digits than its factorization.

156436434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12573 (or 12564 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 156436434 is about 12507.4551368374. The cubic root of 156436434 is about 538.8228059652.

The spelling of 156436434 in words is "one hundred fifty-six million, four hundred thirty-six thousand, four hundred thirty-four".