899405980 has 24 divisors (see below), whose sum is σ = 2060457840. Its totient is φ = 327056640.

The previous prime is 899405963. The next prime is 899405987. The reversal of 899405980 is 89504998.

It is a super-2 number, since 2×899405980² = 1617862233719520800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899405987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2043885 + ... + 2044324.

It is an arithmetic number, because the mean of its divisors is an integer number (85852410).

Almost surely, 2^899405980 is an apocalyptic number.

It is an amenable number.

899405980 is an abundant number, since it is smaller than the sum of its proper divisors (1161051860).

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

899405980 is a wasteful number, since it uses less digits than its factorization.

899405980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088229 (or 4088227 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 899405980 is about 29990.0980325173. The cubic root of 899405980 is about 965.2769230393.

The spelling of 899405980 in words is "eight hundred ninety-nine million, four hundred five thousand, nine hundred eighty".