72972734 has 8 divisors (see below), whose sum is σ = 111314520. Its totient is φ = 35867896.

The previous prime is 72972727. The next prime is 72972761. The reversal of 72972734 is 43727927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72972691 and 72972700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309089 + ... + 309324.

It is an arithmetic number, because the mean of its divisors is an integer number (13914315).

Almost surely, 2^72972734 is an apocalyptic number.

72972734 is a deficient number, since it is larger than the sum of its proper divisors (38341786).

72972734 is a wasteful number, since it uses less digits than its factorization.

72972734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618474.

The product of its digits is 148176, while the sum is 41.

The square root of 72972734 is about 8542.4079743360. The cubic root of 72972734 is about 417.8818794313.

The spelling of 72972734 in words is "seventy-two million, nine hundred seventy-two thousand, seven hundred thirty-four".