72671972 has 6 divisors (see below), whose sum is σ = 127175958. Its totient is φ = 36335984.

The previous prime is 72671953. The next prime is 72671981. The reversal of 72671972 is 27917627.

It can be written as a sum of positive squares in only one way, i.e., 58125376 + 14546596 = 7624^2 + 3814^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9083993 + ... + 9084000.

It is an arithmetic number, because the mean of its divisors is an integer number (21195993).

Almost surely, 2^72671972 is an apocalyptic number.

It is an amenable number.

72671972 is a deficient number, since it is larger than the sum of its proper divisors (54503986).

72671972 is a wasteful number, since it uses less digits than its factorization.

72671972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18167997 (or 18167995 counting only the distinct ones).

The product of its digits is 74088, while the sum is 41.

The square root of 72671972 is about 8524.7857451082. The cubic root of 72671972 is about 417.3069795124.

The spelling of 72671972 in words is "seventy-two million, six hundred seventy-one thousand, nine hundred seventy-two".