72102812 has 6 divisors (see below), whose sum is σ = 126179928. Its totient is φ = 36051404.

The previous prime is 72102809. The next prime is 72102839. The reversal of 72102812 is 21820127.

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, 9012848 + ... + 9012855.

It is an arithmetic number, because the mean of its divisors is an integer number (21029988).

Almost surely, 2^72102812 is an apocalyptic number.

It is an amenable number.

72102812 is a deficient number, since it is larger than the sum of its proper divisors (54077116).

72102812 is a wasteful number, since it uses less digits than its factorization.

72102812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18025707 (or 18025705 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 72102812 is about 8491.3374682673. The cubic root of 72102812 is about 416.2146867089.

Adding to 72102812 its reverse (21820127), we get a palindrome (93922939).

The spelling of 72102812 in words is "seventy-two million, one hundred two thousand, eight hundred twelve".