72704776 has 8 divisors (see below), whose sum is σ = 136321470. Its totient is φ = 36352384.

The previous prime is 72704761. The next prime is 72704777. The reversal of 72704776 is 67740727.

It can be written as a sum of positive squares in only one way, i.e., 72692676 + 12100 = 8526^2 + 110^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72704777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4544041 + ... + 4544056.

Almost surely, 2^72704776 is an apocalyptic number.

It is an amenable number.

72704776 is a deficient number, since it is larger than the sum of its proper divisors (63616694).

72704776 is a wasteful number, since it uses less digits than its factorization.

72704776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9088103 (or 9088099 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 40.

The square root of 72704776 is about 8526.7095646562. The cubic root of 72704776 is about 417.3697606118.

The spelling of 72704776 in words is "seventy-two million, seven hundred four thousand, seven hundred seventy-six".