72947472 has 40 divisors (see below), whose sum is σ = 202945344. Its totient is φ = 22445184.

The previous prime is 72947471. The next prime is 72947473. The reversal of 72947472 is 27474927.

It is an interprime number because it is at equal distance from previous prime (72947471) and next prime (72947473).

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

It is not an unprimeable number, because it can be changed into a prime (72947471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57828 + ... + 59075.

Almost surely, 2^72947472 is an apocalyptic number.

It is an amenable number.

72947472 is an abundant number, since it is smaller than the sum of its proper divisors (129997872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72947472 is a wasteful number, since it uses less digits than its factorization.

72947472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116927 (or 116921 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 72947472 is about 8540.9292234510. The cubic root of 72947472 is about 417.8336525121.

The spelling of 72947472 in words is "seventy-two million, nine hundred forty-seven thousand, four hundred seventy-two".