72961228 has 12 divisors (see below), whose sum is σ = 131801152. Its totient is φ = 35303760.

The previous prime is 72961223. The next prime is 72961243. The reversal of 72961228 is 82216927.

It is not an unprimeable number, because it can be changed into a prime (72961223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294075 + ... + 294322.

Almost surely, 2^72961228 is an apocalyptic number.

It is an amenable number.

72961228 is a deficient number, since it is larger than the sum of its proper divisors (58839924).

72961228 is a wasteful number, since it uses less digits than its factorization.

72961228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588432 (or 588430 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 72961228 is about 8541.7344842836. The cubic root of 72961228 is about 417.8599150556.

The spelling of 72961228 in words is "seventy-two million, nine hundred sixty-one thousand, two hundred twenty-eight".