156573420 has 72 divisors (see below), whose sum is σ = 458388336. Its totient is φ = 39929472.

The previous prime is 156573409. The next prime is 156573457. The reversal of 156573420 is 24375651.

156573420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29274 + ... + 34206.

Almost surely, 2^156573420 is an apocalyptic number.

156573420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156573420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229194168).

156573420 is an abundant number, since it is smaller than the sum of its proper divisors (301814916).

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

156573420 is a wasteful number, since it uses less digits than its factorization.

156573420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991 (or 4966 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 156573420 is about 12512.9301124876. The cubic root of 156573420 is about 538.9800362745.

The spelling of 156573420 in words is "one hundred fifty-six million, five hundred seventy-three thousand, four hundred twenty".