428426615 has 4 divisors (see below), whose sum is σ = 514111944. Its totient is φ = 342741288.

The previous prime is 428426591. The next prime is 428426627. The reversal of 428426615 is 516624824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428426615 - 2¹⁴ = 428410231 is a prime.

It is a Duffinian number.

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, 42842657 + ... + 42842666.

It is an arithmetic number, because the mean of its divisors is an integer number (128527986).

Almost surely, 2^428426615 is an apocalyptic number.

428426615 is a deficient number, since it is larger than the sum of its proper divisors (85685329).

428426615 is an equidigital number, since it uses as much as digits as its factorization.

428426615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85685328.

The product of its digits is 92160, while the sum is 38.

The square root of 428426615 is about 20698.4689047282. The cubic root of 428426615 is about 753.8625123681.

The spelling of 428426615 in words is "four hundred twenty-eight million, four hundred twenty-six thousand, six hundred fifteen".