156404224 has 20 divisors (see below), whose sum is σ = 312503994. Its totient is φ = 78201856.

The previous prime is 156404189. The next prime is 156404263. The reversal of 156404224 is 422404651.

It can be written as a sum of positive squares in only one way, i.e., 154554624 + 1849600 = 12432^2 + 1360^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 156404192 and 156404201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152227 + ... + 153250.

Almost surely, 2^156404224 is an apocalyptic number.

It is an amenable number.

156404224 is a deficient number, since it is larger than the sum of its proper divisors (156099770).

156404224 is an frugal number, since it uses more digits than its factorization.

156404224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305495 (or 305479 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 156404224 is about 12506.1674385081. The cubic root of 156404224 is about 538.7858225221.

Adding to 156404224 its reverse (422404651), we get a palindrome (578808875).

The spelling of 156404224 in words is "one hundred fifty-six million, four hundred four thousand, two hundred twenty-four".