428999499 has 12 divisors (see below), whose sum is σ = 652280200. Its totient is φ = 270946944.

The previous prime is 428999489. The next prime is 428999507. The reversal of 428999499 is 994999824.

It is not a de Polignac number, because 428999499 - 2⁷ = 428999371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428999489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254214 + ... + 1254555.

Almost surely, 2^428999499 is an apocalyptic number.

428999499 is a deficient number, since it is larger than the sum of its proper divisors (223280701).

428999499 is a wasteful number, since it uses less digits than its factorization.

428999499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508794 (or 2508791 counting only the distinct ones).

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

The square root of 428999499 is about 20712.3030829505. The cubic root of 428999499 is about 754.1983796248.

The spelling of 428999499 in words is "four hundred twenty-eight million, nine hundred ninety-nine thousand, four hundred ninety-nine".