72275858 has 4 divisors (see below), whose sum is σ = 108413790. Its totient is φ = 36137928.

The previous prime is 72275851. The next prime is 72275869. The reversal of 72275858 is 85857227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85857227 = 149 ⋅576223.

It can be written as a sum of positive squares in only one way, i.e., 71453209 + 822649 = 8453^2 + 907^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72275851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18068963 + ... + 18068966.

Almost surely, 2^72275858 is an apocalyptic number.

72275858 is a deficient number, since it is larger than the sum of its proper divisors (36137932).

72275858 is a wasteful number, since it uses less digits than its factorization.

72275858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36137931.

The product of its digits is 313600, while the sum is 44.

The square root of 72275858 is about 8501.5209227526. The cubic root of 72275858 is about 416.5473909970.

The spelling of 72275858 in words is "seventy-two million, two hundred seventy-five thousand, eight hundred fifty-eight".