72658478 has 16 divisors (see below), whose sum is σ = 112541184. Its totient is φ = 35159040.

The previous prime is 72658477. The next prime is 72658571. The reversal of 72658478 is 87485627.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72658471) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 6926 + ... + 13902.

It is an arithmetic number, because the mean of its divisors is an integer number (7033824).

Almost surely, 2^72658478 is an apocalyptic number.

72658478 is a deficient number, since it is larger than the sum of its proper divisors (39882706).

72658478 is a wasteful number, since it uses less digits than its factorization.

72658478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147.

The product of its digits is 752640, while the sum is 47.

The square root of 72658478 is about 8523.9942515232. The cubic root of 72658478 is about 417.2811488802.

The spelling of 72658478 in words is "seventy-two million, six hundred fifty-eight thousand, four hundred seventy-eight".