428432215 has 8 divisors (see below), whose sum is σ = 544361040. Its totient is φ = 322584192.

The previous prime is 428432161. The next prime is 428432233. The reversal of 428432215 is 512234824.

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

It is a cyclic number.

It is not a de Polignac number, because 428432215 - 2¹³ = 428424023 is a prime.

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, 2520105 + ... + 2520274.

It is an arithmetic number, because the mean of its divisors is an integer number (68045130).

Almost surely, 2^428432215 is an apocalyptic number.

428432215 is a deficient number, since it is larger than the sum of its proper divisors (115928825).

428432215 is a wasteful number, since it uses less digits than its factorization.

428432215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040401.

The product of its digits is 15360, while the sum is 31.

The square root of 428432215 is about 20698.6041799924. The cubic root of 428432215 is about 753.8657969537.

The spelling of 428432215 in words is "four hundred twenty-eight million, four hundred thirty-two thousand, two hundred fifteen".