649863852 has 48 divisors (see below), whose sum is σ = 1677521664. Its totient is φ = 194152000.

The previous prime is 649863839. The next prime is 649863857. The reversal of 649863852 is 258368946.

It is a super-2 number, since 2×649863852² = 844646052272555808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649863795 and 649863804.

It is not an unprimeable number, because it can be changed into a prime (649863857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25299 + ... + 44042.

It is an arithmetic number, because the mean of its divisors is an integer number (34948368).

Almost surely, 2^649863852 is an apocalyptic number.

It is an amenable number.

649863852 is an abundant number, since it is smaller than the sum of its proper divisors (1027657812).

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

649863852 is a wasteful number, since it uses less digits than its factorization.

649863852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69430 (or 69428 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 649863852 is about 25492.4273461748. The cubic root of 649863852 is about 866.1786207476.

The spelling of 649863852 in words is "six hundred forty-nine million, eight hundred sixty-three thousand, eight hundred fifty-two".