428432213 has 16 divisors (see below), whose sum is σ = 490247424. Its totient is φ = 370877760.

The previous prime is 428432161. The next prime is 428432233. The reversal of 428432213 is 312234824.

It is not a de Polignac number, because 428432213 - 2²⁰ = 427383637 is a prime.

It is a super-2 number, since 2×428432213² = 367108322272154738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428432233) 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, 7931 + ... + 30327.

It is an arithmetic number, because the mean of its divisors is an integer number (30640464).

Almost surely, 2^428432213 is an apocalyptic number.

It is an amenable number.

428432213 is a deficient number, since it is larger than the sum of its proper divisors (61815211).

428432213 is a wasteful number, since it uses less digits than its factorization.

428432213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22492.

The product of its digits is 9216, while the sum is 29.

The square root of 428432213 is about 20698.6041316800. The cubic root of 428432213 is about 753.8657957806.

The spelling of 428432213 in words is "four hundred twenty-eight million, four hundred thirty-two thousand, two hundred thirteen".