899644436 has 24 divisors (see below), whose sum is σ = 1592398080. Its totient is φ = 444688992.

The previous prime is 899644423. The next prime is 899644469. The reversal of 899644436 is 634446998.

It is a super-2 number, since 2×899644436² = 1618720222451516192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 294710 + ... + 297746.

It is an arithmetic number, because the mean of its divisors is an integer number (66349920).

Almost surely, 2^899644436 is an apocalyptic number.

It is an amenable number.

899644436 is a deficient number, since it is larger than the sum of its proper divisors (692753644).

899644436 is a wasteful number, since it uses less digits than its factorization.

899644436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3863 (or 3861 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 53.

The square root of 899644436 is about 29994.0733479133. The cubic root of 899644436 is about 965.3622222034.

The spelling of 899644436 in words is "eight hundred ninety-nine million, six hundred forty-four thousand, four hundred thirty-six".