71712628 has 12 divisors (see below), whose sum is σ = 135150820. Its totient is φ = 33098112.

The previous prime is 71712611. The next prime is 71712653. The reversal of 71712628 is 82621717.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38787984 + 32924644 = 6228^2 + 5738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71712593 and 71712602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689493 + ... + 689596.

Almost surely, 2^71712628 is an apocalyptic number.

It is an amenable number.

71712628 is a deficient number, since it is larger than the sum of its proper divisors (63438192).

71712628 is a wasteful number, since it uses less digits than its factorization.

71712628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379106 (or 1379104 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 71712628 is about 8468.3308863081. The cubic root of 71712628 is about 415.4625471205.

The spelling of 71712628 in words is "seventy-one million, seven hundred twelve thousand, six hundred twenty-eight".