899640464 has 10 divisors (see below), whose sum is σ = 1743053430. Its totient is φ = 449820224.

The previous prime is 899640451. The next prime is 899640473. The reversal of 899640464 is 464046998.

It can be written as a sum of positive squares in only one way, i.e., 864830464 + 34810000 = 29408^2 + 5900^2 .

It is a super-2 number, since 2×899640464² = 1618705928932270592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28113749 + ... + 28113780.

It is an arithmetic number, because the mean of its divisors is an integer number (174305343).

Almost surely, 2^899640464 is an apocalyptic number.

It is an amenable number.

899640464 is a deficient number, since it is larger than the sum of its proper divisors (843412966).

899640464 is a wasteful number, since it uses less digits than its factorization.

899640464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56227537 (or 56227531 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The square root of 899640464 is about 29994.0071347594. The cubic root of 899640464 is about 965.3608014850.

The spelling of 899640464 in words is "eight hundred ninety-nine million, six hundred forty thousand, four hundred sixty-four".