649381630 has 16 divisors (see below), whose sum is σ = 1209193920. Its totient is φ = 250795552.

The previous prime is 649381627. The next prime is 649381631. The reversal of 649381630 is 36183946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649381631) 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, 1119334 + ... + 1119913.

It is an arithmetic number, because the mean of its divisors is an integer number (75574620).

Almost surely, 2^649381630 is an apocalyptic number.

649381630 is a deficient number, since it is larger than the sum of its proper divisors (559812290).

649381630 is a wasteful number, since it uses less digits than its factorization.

649381630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239283.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 649381630 is about 25482.9674488667. The cubic root of 649381630 is about 865.9643226594.

The spelling of 649381630 in words is "six hundred forty-nine million, three hundred eighty-one thousand, six hundred thirty".