649213910 has 8 divisors (see below), whose sum is σ = 1168585056. Its totient is φ = 259685560.

The previous prime is 649213897. The next prime is 649213913. The reversal of 649213910 is 19312946.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649213913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32460686 + ... + 32460705.

It is an arithmetic number, because the mean of its divisors is an integer number (146073132).

Almost surely, 2^649213910 is an apocalyptic number.

649213910 is a deficient number, since it is larger than the sum of its proper divisors (519371146).

649213910 is a wasteful number, since it uses less digits than its factorization.

649213910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64921398.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 649213910 is about 25479.6764108181. The cubic root of 649213910 is about 865.8897635018.

It can be divided in two parts, 6492 and 13910, that added together give a palindrome (20402).

The spelling of 649213910 in words is "six hundred forty-nine million, two hundred thirteen thousand, nine hundred ten".