899505906 has 32 divisors (see below), whose sum is σ = 1982460480. Its totient is φ = 270333504.

The previous prime is 899505857. The next prime is 899505941. The reversal of 899505906 is 609505998.

It is a super-2 number, since 2×899505906² = 1618221749857761672, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130741 + ... + 137448.

It is an arithmetic number, because the mean of its divisors is an integer number (61951890).

Almost surely, 2^899505906 is an apocalyptic number.

899505906 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

899505906 is an abundant number, since it is smaller than the sum of its proper divisors (1082954574).

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

899505906 is a wasteful number, since it uses less digits than its factorization.

899505906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268250.

The product of its (nonzero) digits is 874800, while the sum is 51.

The square root of 899505906 is about 29991.7639694633. The cubic root of 899505906 is about 965.3126698514.

The spelling of 899505906 in words is "eight hundred ninety-nine million, five hundred five thousand, nine hundred six".