72536258 has 4 divisors (see below), whose sum is σ = 108804390. Its totient is φ = 36268128.

The previous prime is 72536251. The next prime is 72536291. The reversal of 72536258 is 85263527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85263527 = 1009 ⋅84503.

It can be written as a sum of positive squares in only one way, i.e., 70442449 + 2093809 = 8393^2 + 1447^2 .

It is not an unprimeable number, because it can be changed into a prime (72536251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18134063 + ... + 18134066.

Almost surely, 2^72536258 is an apocalyptic number.

72536258 is a deficient number, since it is larger than the sum of its proper divisors (36268132).

72536258 is a wasteful number, since it uses less digits than its factorization.

72536258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36268131.

The product of its digits is 100800, while the sum is 38.

The square root of 72536258 is about 8516.8220599000. The cubic root of 72536258 is about 417.0470457803.

The spelling of 72536258 in words is "seventy-two million, five hundred thirty-six thousand, two hundred fifty-eight".