72736642 has 16 divisors (see below), whose sum is σ = 126025632. Its totient is φ = 31117120.

The previous prime is 72736637. The next prime is 72736691. The reversal of 72736642 is 24663727.

It is a happy number.

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, 96868 + ... + 97615.

It is an arithmetic number, because the mean of its divisors is an integer number (7876602).

Almost surely, 2^72736642 is an apocalyptic number.

72736642 is a deficient number, since it is larger than the sum of its proper divisors (53288990).

72736642 is a wasteful number, since it uses less digits than its factorization.

72736642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194513.

The product of its digits is 84672, while the sum is 37.

The square root of 72736642 is about 8528.5779588393. The cubic root of 72736642 is about 417.4307284643.

The spelling of 72736642 in words is "seventy-two million, seven hundred thirty-six thousand, six hundred forty-two".