156805434 has 24 divisors (see below), whose sum is σ = 347647872. Its totient is φ = 51052680.

The previous prime is 156805427. The next prime is 156805457. The reversal of 156805434 is 434508651.

It is a happy number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 100522 + ... + 102069.

It is an arithmetic number, because the mean of its divisors is an integer number (14485328).

Almost surely, 2^156805434 is an apocalyptic number.

156805434 is an abundant number, since it is smaller than the sum of its proper divisors (190842438).

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

156805434 is a wasteful number, since it uses less digits than its factorization.

156805434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202642 (or 202639 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 156805434 is about 12522.1976505724. The cubic root of 156805434 is about 539.2461291128.

The spelling of 156805434 in words is "one hundred fifty-six million, eight hundred five thousand, four hundred thirty-four".