72420718 has 16 divisors (see below), whose sum is σ = 109699920. Its totient is φ = 35856256.

The previous prime is 72420713. The next prime is 72420791. The reversal of 72420718 is 81702427.

It is a self number, because there is not a number n which added to its sum of digits gives 72420718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72420713) 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, 121830 + ... + 122422.

It is an arithmetic number, because the mean of its divisors is an integer number (6856245).

Almost surely, 2^72420718 is an apocalyptic number.

72420718 is a deficient number, since it is larger than the sum of its proper divisors (37279202).

72420718 is a wasteful number, since it uses less digits than its factorization.

72420718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 72420718 is about 8510.0363101458. The cubic root of 72420718 is about 416.8254957860.

The spelling of 72420718 in words is "seventy-two million, four hundred twenty thousand, seven hundred eighteen".