849451572 has 18 divisors (see below), whose sum is σ = 2147224898. Its totient is φ = 283150512.

The previous prime is 849451567. The next prime is 849451583. The reversal of 849451572 is 275154948.

849451572 is a `hidden beast` number, since 8 + 494 + 5 + 157 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 663783696 + 185667876 = 25764^2 + 13626^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11797903 + ... + 11797974.

Almost surely, 2^849451572 is an apocalyptic number.

It is an amenable number.

849451572 is an abundant number, since it is smaller than the sum of its proper divisors (1297773326).

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

849451572 is a wasteful number, since it uses less digits than its factorization.

849451572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23595887 (or 23595882 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 849451572 is about 29145.3524940084. The cubic root of 849451572 is about 947.0644645603.

The spelling of 849451572 in words is "eight hundred forty-nine million, four hundred fifty-one thousand, five hundred seventy-two".