72745634 has 16 divisors (see below), whose sum is σ = 117785472. Its totient is φ = 33496848.

The previous prime is 72745591. The next prime is 72745657. The reversal of 72745634 is 43654727.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9017 + ... + 15059.

It is an arithmetic number, because the mean of its divisors is an integer number (7361592).

Almost surely, 2^72745634 is an apocalyptic number.

72745634 is a deficient number, since it is larger than the sum of its proper divisors (45039838).

72745634 is a wasteful number, since it uses less digits than its factorization.

72745634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521.

The product of its digits is 141120, while the sum is 38.

The square root of 72745634 is about 8529.1051113232. The cubic root of 72745634 is about 417.4479292513.

The spelling of 72745634 in words is "seventy-two million, seven hundred forty-five thousand, six hundred thirty-four".