649383902 has 8 divisors (see below), whose sum is σ = 974277696. Its totient is φ = 324624672.

The previous prime is 649383859. The next prime is 649383941. The reversal of 649383902 is 209383946.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20558 + ... + 41489.

It is an arithmetic number, because the mean of its divisors is an integer number (121784712).

Almost surely, 2^649383902 is an apocalyptic number.

649383902 is a deficient number, since it is larger than the sum of its proper divisors (324893794).

649383902 is a wasteful number, since it uses less digits than its factorization.

649383902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67282.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 649383902 is about 25483.0120276234. The cubic root of 649383902 is about 865.9653325785.

Adding to 649383902 its sum of digits (44), we get a palindrome (649383946).

The spelling of 649383902 in words is "six hundred forty-nine million, three hundred eighty-three thousand, nine hundred two".