649683408 has 40 divisors (see below), whose sum is σ = 1830927456. Its totient is φ = 196873600.

The previous prime is 649683403. The next prime is 649683449. The reversal of 649683408 is 804386946.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649683401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614703 + ... + 615758.

Almost surely, 2^649683408 is an apocalyptic number.

It is an amenable number.

649683408 is an abundant number, since it is smaller than the sum of its proper divisors (1181244048).

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

649683408 is a wasteful number, since it uses less digits than its factorization.

649683408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230483 (or 1230477 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 649683408 is about 25488.8879318028. The cubic root of 649683408 is about 866.0984443625.

The spelling of 649683408 in words is "six hundred forty-nine million, six hundred eighty-three thousand, four hundred eight".