72761878 has 16 divisors (see below), whose sum is σ = 125948160. Its totient is φ = 30880296.

The previous prime is 72761813. The next prime is 72761879. The reversal of 72761878 is 87816727.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72761879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23788 + ... + 26671.

It is an arithmetic number, because the mean of its divisors is an integer number (7871760).

Almost surely, 2^72761878 is an apocalyptic number.

72761878 is a deficient number, since it is larger than the sum of its proper divisors (53186282).

72761878 is a wasteful number, since it uses less digits than its factorization.

72761878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50571.

The product of its digits is 263424, while the sum is 46.

The square root of 72761878 is about 8530.0573268883. The cubic root of 72761878 is about 417.4789987882.

The spelling of 72761878 in words is "seventy-two million, seven hundred sixty-one thousand, eight hundred seventy-eight".