156473820 has 36 divisors (see below), whose sum is σ = 474637800. Its totient is φ = 41726304.

The previous prime is 156473783. The next prime is 156473827. The reversal of 156473820 is 28374651.

156473820 is a `hidden beast` number, since 1 + 5 + 647 + 3 + 8 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156473827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434470 + ... + 434829.

Almost surely, 2^156473820 is an apocalyptic number.

156473820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156473820 is an abundant number, since it is smaller than the sum of its proper divisors (318163980).

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

156473820 is a wasteful number, since it uses less digits than its factorization.

156473820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869314 (or 869309 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 156473820 is about 12508.9495961891. The cubic root of 156473820 is about 538.8657261136.

The spelling of 156473820 in words is "one hundred fifty-six million, four hundred seventy-three thousand, eight hundred twenty".