72941812 has 6 divisors (see below), whose sum is σ = 127648178. Its totient is φ = 36470904.

The previous prime is 72941801. The next prime is 72941851. The reversal of 72941812 is 21814927.

It can be written as a sum of positive squares in only one way, i.e., 44169316 + 28772496 = 6646^2 + 5364^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9117723 + ... + 9117730.

Almost surely, 2^72941812 is an apocalyptic number.

It is an amenable number.

72941812 is a deficient number, since it is larger than the sum of its proper divisors (54706366).

72941812 is a wasteful number, since it uses less digits than its factorization.

72941812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18235457 (or 18235455 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 72941812 is about 8540.5978713437. The cubic root of 72941812 is about 417.8228456508.

The spelling of 72941812 in words is "seventy-two million, nine hundred forty-one thousand, eight hundred twelve".