72539878 has 8 divisors (see below), whose sum is σ = 109357200. Its totient is φ = 36087480.

The previous prime is 72539837. The next prime is 72539897. The reversal of 72539878 is 87893527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90733 + ... + 91528.

It is an arithmetic number, because the mean of its divisors is an integer number (13669650).

Almost surely, 2^72539878 is an apocalyptic number.

72539878 is a deficient number, since it is larger than the sum of its proper divisors (36817322).

72539878 is a wasteful number, since it uses less digits than its factorization.

72539878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182462.

The product of its digits is 846720, while the sum is 49.

The square root of 72539878 is about 8517.0345778328. The cubic root of 72539878 is about 417.0539833920.

The spelling of 72539878 in words is "seventy-two million, five hundred thirty-nine thousand, eight hundred seventy-eight".