649865822 has 8 divisors (see below), whose sum is σ = 978318696. Its totient is φ = 323759592.

The previous prime is 649865819. The next prime is 649865869. The reversal of 649865822 is 228568946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585968 + ... + 587075.

It is an arithmetic number, because the mean of its divisors is an integer number (122289837).

Almost surely, 2^649865822 is an apocalyptic number.

649865822 is a deficient number, since it is larger than the sum of its proper divisors (328452874).

649865822 is a wasteful number, since it uses less digits than its factorization.

649865822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173322.

The product of its digits is 1658880, while the sum is 50.

The square root of 649865822 is about 25492.4659850710. The cubic root of 649865822 is about 866.1794959925.

The spelling of 649865822 in words is "six hundred forty-nine million, eight hundred sixty-five thousand, eight hundred twenty-two".