72864478 has 8 divisors (see below), whose sum is σ = 110525040. Its totient is φ = 36022800.

The previous prime is 72864461. The next prime is 72864497. The reversal of 72864478 is 87446827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204498 + ... + 204853.

It is an arithmetic number, because the mean of its divisors is an integer number (13815630).

Almost surely, 2^72864478 is an apocalyptic number.

72864478 is a deficient number, since it is larger than the sum of its proper divisors (37660562).

72864478 is a wasteful number, since it uses less digits than its factorization.

72864478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409442.

The product of its digits is 602112, while the sum is 46.

The square root of 72864478 is about 8536.0692358954. The cubic root of 72864478 is about 417.6751327593.

The spelling of 72864478 in words is "seventy-two million, eight hundred sixty-four thousand, four hundred seventy-eight".