72536428 has 12 divisors (see below), whose sum is σ = 130369792. Its totient is φ = 35287920.

The previous prime is 72536423. The next prime is 72536447. The reversal of 72536428 is 82463527.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (72536423) 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, 244908 + ... + 245203.

Almost surely, 2^72536428 is an apocalyptic number.

It is an amenable number.

72536428 is a deficient number, since it is larger than the sum of its proper divisors (57833364).

72536428 is a wasteful number, since it uses less digits than its factorization.

72536428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490152 (or 490150 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 72536428 is about 8516.8320401426. The cubic root of 72536428 is about 417.0473715849.

The spelling of 72536428 in words is "seventy-two million, five hundred thirty-six thousand, four hundred twenty-eight".