72518878 has 4 divisors (see below), whose sum is σ = 108778320. Its totient is φ = 36259438.

The previous prime is 72518869. The next prime is 72518881. The reversal of 72518878 is 87881527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87881527 = 137 ⋅641471.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18129718 + ... + 18129721.

It is an arithmetic number, because the mean of its divisors is an integer number (27194580).

Almost surely, 2^72518878 is an apocalyptic number.

72518878 is a deficient number, since it is larger than the sum of its proper divisors (36259442).

72518878 is a wasteful number, since it uses less digits than its factorization.

72518878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36259441.

The product of its digits is 250880, while the sum is 46.

The square root of 72518878 is about 8515.8016651399. The cubic root of 72518878 is about 417.0137343631.

It can be divided in two parts, 7251 and 8878, that added together give a square (16129 = 127²).

The spelling of 72518878 in words is "seventy-two million, five hundred eighteen thousand, eight hundred seventy-eight".