899221072 has 10 divisors (see below), whose sum is σ = 1742240858. Its totient is φ = 449610528.

The previous prime is 899221039. The next prime is 899221091. The reversal of 899221072 is 270122998.

It can be written as a sum of positive squares in only one way, i.e., 740057616 + 159163456 = 27204^2 + 12616^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28100643 + ... + 28100674.

Almost surely, 2^899221072 is an apocalyptic number.

It is an amenable number.

899221072 is a deficient number, since it is larger than the sum of its proper divisors (843019786).

899221072 is a wasteful number, since it uses less digits than its factorization.

899221072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56201325 (or 56201319 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 899221072 is about 29987.0150565207. The cubic root of 899221072 is about 965.2107683911.

The spelling of 899221072 in words is "eight hundred ninety-nine million, two hundred twenty-one thousand, seventy-two".