228724156 has 12 divisors (see below), whose sum is σ = 400671040. Its totient is φ = 114246720.

The previous prime is 228724129. The next prime is 228724193. The reversal of 228724156 is 651427822.

It is a happy number.

228724156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24300 + ... + 32371.

Almost surely, 2^228724156 is an apocalyptic number.

It is an amenable number.

228724156 is a deficient number, since it is larger than the sum of its proper divisors (171946884).

228724156 is a wasteful number, since it uses less digits than its factorization.

228724156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57684 (or 57682 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 228724156 is about 15123.6290618357. The cubic root of 228724156 is about 611.5575675097.

It can be divided in two parts, 22872 and 4156, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 228724156 in words is "two hundred twenty-eight million, seven hundred twenty-four thousand, one hundred fifty-six".