72872858 has 4 divisors (see below), whose sum is σ = 109309290. Its totient is φ = 36436428.

The previous prime is 72872851. The next prime is 72872887. The reversal of 72872858 is 85827827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56896849 + 15976009 = 7543^2 + 3997^2 .

It is not an unprimeable number, because it can be changed into a prime (72872851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18218213 + ... + 18218216.

Almost surely, 2^72872858 is an apocalyptic number.

72872858 is a deficient number, since it is larger than the sum of its proper divisors (36436432).

72872858 is a wasteful number, since it uses less digits than its factorization.

72872858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36436431.

The product of its digits is 501760, while the sum is 47.

The square root of 72872858 is about 8536.5600800322. The cubic root of 72872858 is about 417.6911441435.

It can be divided in two parts, 728728 and 58, that multiplied together give a palindrome (42266224).

The spelling of 72872858 in words is "seventy-two million, eight hundred seventy-two thousand, eight hundred fifty-eight".