72654638 has 16 divisors (see below), whose sum is σ = 128569344. Its totient is φ = 30133080.

The previous prime is 72654619. The next prime is 72654661. The reversal of 72654638 is 83645627.

It is a happy number.

It is a super-3 number, since 3×72654638³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72654595 and 72654604.

It is a congruent 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, 83270 + ... + 84137.

It is an arithmetic number, because the mean of its divisors is an integer number (8035584).

Almost surely, 2^72654638 is an apocalyptic number.

72654638 is a deficient number, since it is larger than the sum of its proper divisors (55914706).

72654638 is a wasteful number, since it uses less digits than its factorization.

72654638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167447.

The product of its digits is 241920, while the sum is 41.

The square root of 72654638 is about 8523.7690020319. The cubic root of 72654638 is about 417.2737976488.

The spelling of 72654638 in words is "seventy-two million, six hundred fifty-four thousand, six hundred thirty-eight".