72501838 has 8 divisors (see below), whose sum is σ = 115150032. Its totient is φ = 34118496.

The previous prime is 72501829. The next prime is 72501851. The reversal of 72501838 is 83810527.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 2132407 = 72501838 / (7 + 2 + 5 + 0 + 1 + 8 + 3 + 8).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066170 + ... + 1066237.

It is an arithmetic number, because the mean of its divisors is an integer number (14393754).

Almost surely, 2^72501838 is an apocalyptic number.

72501838 is a deficient number, since it is larger than the sum of its proper divisors (42648194).

72501838 is a wasteful number, since it uses less digits than its factorization.

72501838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132426.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 72501838 is about 8514.8011133555. The cubic root of 72501838 is about 416.9810694403.

The spelling of 72501838 in words is "seventy-two million, five hundred one thousand, eight hundred thirty-eight".