72347838 has 16 divisors (see below), whose sum is σ = 146188560. Its totient is φ = 23867136.

The previous prime is 72347797. The next prime is 72347867. The reversal of 72347838 is 83874327.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72347838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61573 + ... + 62736.

It is an arithmetic number, because the mean of its divisors is an integer number (9136785).

Almost surely, 2^72347838 is an apocalyptic number.

72347838 is an abundant number, since it is smaller than the sum of its proper divisors (73840722).

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

72347838 is a wasteful number, since it uses less digits than its factorization.

72347838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124411.

The product of its digits is 225792, while the sum is 42.

The square root of 72347838 is about 8505.7532294324. The cubic root of 72347838 is about 416.6856258751.

The spelling of 72347838 in words is "seventy-two million, three hundred forty-seven thousand, eight hundred thirty-eight".