428999994 has 24 divisors (see below), whose sum is σ = 929952192. Its totient is φ = 142930440.

The previous prime is 428999971. The next prime is 429000017. The reversal of 428999994 is 499999824.

It is an interprime number because it is at equal distance from previous prime (428999971) and next prime (429000017).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43617 + ... + 52539.

It is an arithmetic number, because the mean of its divisors is an integer number (38748008).

Almost surely, 2^428999994 is an apocalyptic number.

428999994 is an abundant number, since it is smaller than the sum of its proper divisors (500952198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428999994 is a wasteful number, since it uses less digits than its factorization.

428999994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11602 (or 11599 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 428999994 is about 20712.3150323666. The cubic root of 428999994 is about 754.1986697014.

The spelling of 428999994 in words is "four hundred twenty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-four".