649813692 has 96 divisors (see below), whose sum is σ = 1716019200. Its totient is φ = 189604800.

The previous prime is 649813691. The next prime is 649813727. The reversal of 649813692 is 296318946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649813691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1550659 + ... + 1551077.

It is an arithmetic number, because the mean of its divisors is an integer number (17875200).

Almost surely, 2^649813692 is an apocalyptic number.

649813692 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649813692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858009600).

649813692 is an abundant number, since it is smaller than the sum of its proper divisors (1066205508).

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

649813692 is a wasteful number, since it uses less digits than its factorization.

649813692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 845 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 649813692 is about 25491.4435056158. The cubic root of 649813692 is about 866.1563347270.

The spelling of 649813692 in words is "six hundred forty-nine million, eight hundred thirteen thousand, six hundred ninety-two".