72047908 has 6 divisors (see below), whose sum is σ = 126083846. Its totient is φ = 36023952.

The previous prime is 72047897. The next prime is 72047929. The reversal of 72047908 is 80974027.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72046144 + 1764 = 8488^2 + 42^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005985 + ... + 9005992.

Almost surely, 2^72047908 is an apocalyptic number.

It is an amenable number.

72047908 is a deficient number, since it is larger than the sum of its proper divisors (54035938).

72047908 is a wasteful number, since it uses less digits than its factorization.

72047908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18011981 (or 18011979 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 72047908 is about 8488.1039107683. The cubic root of 72047908 is about 416.1090151302.

The spelling of 72047908 in words is "seventy-two million, forty-seven thousand, nine hundred eight".