428407384 has 32 divisors (see below), whose sum is σ = 841753440. Its totient is φ = 204019200.

The previous prime is 428407373. The next prime is 428407393. The reversal of 428407384 is 483704824.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 39514 + ... + 49174.

It is an arithmetic number, because the mean of its divisors is an integer number (26304795).

Almost surely, 2^428407384 is an apocalyptic number.

It is an amenable number.

428407384 is a deficient number, since it is larger than the sum of its proper divisors (413346056).

428407384 is a wasteful number, since it uses less digits than its factorization.

428407384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931 (or 9927 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 40.

The square root of 428407384 is about 20698.0043482458. The cubic root of 428407384 is about 753.8512325313.

The spelling of 428407384 in words is "four hundred twenty-eight million, four hundred seven thousand, three hundred eighty-four".