72617704 has 8 divisors (see below), whose sum is σ = 136158210. Its totient is φ = 36308848.

The previous prime is 72617689. The next prime is 72617723. The reversal of 72617704 is 40771627.

It can be written as a sum of positive squares in only one way, i.e., 62441604 + 10176100 = 7902^2 + 3190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 72617704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4538599 + ... + 4538614.

Almost surely, 2^72617704 is an apocalyptic number.

It is an amenable number.

72617704 is a deficient number, since it is larger than the sum of its proper divisors (63540506).

72617704 is a wasteful number, since it uses less digits than its factorization.

72617704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9077219 (or 9077215 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 72617704 is about 8521.6021967703. The cubic root of 72617704 is about 417.2030785908.

The spelling of 72617704 in words is "seventy-two million, six hundred seventeen thousand, seven hundred four".