478989615 has 16 divisors (see below), whose sum is σ = 825336288. Its totient is φ = 235810176.

The previous prime is 478989557. The next prime is 478989619. The reversal of 478989615 is 516989874.

It is not a de Polignac number, because 478989615 - 2⁶ = 478989551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478989619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1227984 + ... + 1228373.

It is an arithmetic number, because the mean of its divisors is an integer number (51583518).

Almost surely, 2^478989615 is an apocalyptic number.

478989615 is a deficient number, since it is larger than the sum of its proper divisors (346346673).

478989615 is a wasteful number, since it uses less digits than its factorization.

478989615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456378.

The product of its digits is 4354560, while the sum is 57.

The square root of 478989615 is about 21885.8313755726. The cubic root of 478989615 is about 782.4237640380.

The spelling of 478989615 in words is "four hundred seventy-eight million, nine hundred eighty-nine thousand, six hundred fifteen".