72386878 has 4 divisors (see below), whose sum is σ = 108580320. Its totient is φ = 36193438.

The previous prime is 72386869. The next prime is 72386879. The reversal of 72386878 is 87868327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87868327 = 1171 ⋅75037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72386879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18096718 + ... + 18096721.

It is an arithmetic number, because the mean of its divisors is an integer number (27145080).

Almost surely, 2^72386878 is an apocalyptic number.

72386878 is a deficient number, since it is larger than the sum of its proper divisors (36193442).

72386878 is a wasteful number, since it uses less digits than its factorization.

72386878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36193441.

The product of its digits is 903168, while the sum is 49.

The square root of 72386878 is about 8508.0478371951. The cubic root of 72386878 is about 416.7605623768.

The spelling of 72386878 in words is "seventy-two million, three hundred eighty-six thousand, eight hundred seventy-eight".