156205434 has 72 divisors (see below), whose sum is σ = 399549024. Its totient is φ = 40563600.

The previous prime is 156205421. The next prime is 156205447. The reversal of 156205434 is 434502651.

156205434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (156205421) and next prime (156205447).

It is a super-2 number, since 2×156205434² = 48800275222256712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33379 + ... + 37769.

It is an arithmetic number, because the mean of its divisors is an integer number (5549292).

Almost surely, 2^156205434 is an apocalyptic number.

156205434 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 156205434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199774512).

156205434 is an abundant number, since it is smaller than the sum of its proper divisors (243343590).

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

156205434 is a wasteful number, since it uses less digits than its factorization.

156205434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432 (or 4414 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 156205434 is about 12498.2172328697. The cubic root of 156205434 is about 538.5574598859.

The spelling of 156205434 in words is "one hundred fifty-six million, two hundred five thousand, four hundred thirty-four".