72743878 has 16 divisors (see below), whose sum is σ = 111787776. Its totient is φ = 35488960.

The previous prime is 72743857. The next prime is 72743899. The reversal of 72743878 is 87834727.

It is an interprime number because it is at equal distance from previous prime (72743857) and next prime (72743899).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18450 + ... + 22042.

It is an arithmetic number, because the mean of its divisors is an integer number (6986736).

Almost surely, 2^72743878 is an apocalyptic number.

72743878 is a deficient number, since it is larger than the sum of its proper divisors (39043898).

72743878 is a wasteful number, since it uses less digits than its factorization.

72743878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839.

The product of its digits is 526848, while the sum is 46.

The square root of 72743878 is about 8529.0021690700. The cubic root of 72743878 is about 417.4445703122. Note that the first 3 decimals are identical.

The spelling of 72743878 in words is "seventy-two million, seven hundred forty-three thousand, eight hundred seventy-eight".