72058138 has 16 divisors (see below), whose sum is σ = 115736040. Its totient is φ = 33527296.

The previous prime is 72058123. The next prime is 72058139. The reversal of 72058138 is 83185027.

It can be written as a sum of positive squares in 4 ways, for example, as 60949249 + 11108889 = 7807^2 + 3333^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (72058139) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8881 + ... + 14932.

Almost surely, 2^72058138 is an apocalyptic number.

72058138 is a deficient number, since it is larger than the sum of its proper divisors (43677902).

72058138 is a wasteful number, since it uses less digits than its factorization.

72058138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23921.

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

The square root of 72058138 is about 8488.7064974588. The cubic root of 72058138 is about 416.1287084791.

The spelling of 72058138 in words is "seventy-two million, fifty-eight thousand, one hundred thirty-eight".