999450840 has 64 divisors (see below), whose sum is σ = 3047528160. Its totient is φ = 262149120.

The previous prime is 999450833. The next prime is 999450841. The reversal of 999450840 is 48054999.

999450840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 999450840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999450841) 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, 60949 + ... + 75588.

Almost surely, 2^999450840 is an apocalyptic number.

It is an amenable number.

999450840 is an abundant number, since it is smaller than the sum of its proper divisors (2048077320).

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

999450840 is a wasteful number, since it uses less digits than its factorization.

999450840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136612 (or 136608 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 999450840 is about 31614.0924272705. The cubic root of 999450840 is about 999.8169131479.

The spelling of 999450840 in words is "nine hundred ninety-nine million, four hundred fifty thousand, eight hundred forty".