72473812 has 24 divisors (see below), whose sum is σ = 129991680. Its totient is φ = 35339040.

The previous prime is 72473803. The next prime is 72473831. The reversal of 72473812 is 21837427.

It is a super-2 number, since 2×72473812² = 10504906851622688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72637 + ... + 73627.

It is an arithmetic number, because the mean of its divisors is an integer number (5416320).

Almost surely, 2^72473812 is an apocalyptic number.

It is an amenable number.

72473812 is a deficient number, since it is larger than the sum of its proper divisors (57517868).

72473812 is a wasteful number, since it uses less digits than its factorization.

72473812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431 (or 1429 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 72473812 is about 8513.1552317575. The cubic root of 72473812 is about 416.9273337102.

The spelling of 72473812 in words is "seventy-two million, four hundred seventy-three thousand, eight hundred twelve".