999910428 has 48 divisors (see below), whose sum is σ = 2551046400. Its totient is φ = 302310400.

The previous prime is 999910421. The next prime is 999910447. The reversal of 999910428 is 824019999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999910421) 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, 50833 + ... + 67703.

It is an arithmetic number, because the mean of its divisors is an integer number (53146800).

Almost surely, 2^999910428 is an apocalyptic number.

It is an amenable number.

999910428 is an abundant number, since it is smaller than the sum of its proper divisors (1551135972).

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

999910428 is a wasteful number, since it uses less digits than its factorization.

999910428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17338 (or 17336 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The square root of 999910428 is about 31621.3603122952. The cubic root of 999910428 is about 999.9701417752.

The spelling of 999910428 in words is "nine hundred ninety-nine million, nine hundred ten thousand, four hundred twenty-eight".