72438424 has 32 divisors (see below), whose sum is σ = 138017520. Its totient is φ = 35639296.

The previous prime is 72438419. The next prime is 72438427. The reversal of 72438424 is 42483427.

It is a self number, because there is not a number n which added to its sum of digits gives 72438424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72438427) 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, 205032 + ... + 205384.

Almost surely, 2^72438424 is an apocalyptic number.

It is an amenable number.

72438424 is a deficient number, since it is larger than the sum of its proper divisors (65579096).

72438424 is a wasteful number, since it uses less digits than its factorization.

72438424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 695 counting only the distinct ones).

The product of its digits is 43008, while the sum is 34.

The square root of 72438424 is about 8511.0765476525. The cubic root of 72438424 is about 416.8594626353.

The spelling of 72438424 in words is "seventy-two million, four hundred thirty-eight thousand, four hundred twenty-four".