72958538 has 4 divisors (see below), whose sum is σ = 109437810. Its totient is φ = 36479268.

The previous prime is 72958517. The next prime is 72958541. The reversal of 72958538 is 83585927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83585927 = 673 ⋅124199.

It can be written as a sum of positive squares in only one way, i.e., 52374169 + 20584369 = 7237^2 + 4537^2 .

It is a super-3 number, since 3×72958538³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72958492 and 72958501.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18239633 + ... + 18239636.

Almost surely, 2^72958538 is an apocalyptic number.

72958538 is a deficient number, since it is larger than the sum of its proper divisors (36479272).

72958538 is a wasteful number, since it uses less digits than its factorization.

72958538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36479271.

The product of its digits is 604800, while the sum is 47.

The square root of 72958538 is about 8541.5770206678. The cubic root of 72958538 is about 417.8547796477.

The spelling of 72958538 in words is "seventy-two million, nine hundred fifty-eight thousand, five hundred thirty-eight".