649638110 has 24 divisors (see below), whose sum is σ = 1285319448. Its totient is φ = 236231600.

The previous prime is 649638107. The next prime is 649638113. The reversal of 649638110 is 11836946.

It is an interprime number because it is at equal distance from previous prime (649638107) and next prime (649638113).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649638113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267236 + ... + 269655.

It is an arithmetic number, because the mean of its divisors is an integer number (53554977).

Almost surely, 2^649638110 is an apocalyptic number.

649638110 is a deficient number, since it is larger than the sum of its proper divisors (635681338).

649638110 is a wasteful number, since it uses less digits than its factorization.

649638110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536920 (or 536909 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 649638110 is about 25487.9993330195. Note that the first 3 decimals coincide. The cubic root of 649638110 is about 866.0783148458.

The spelling of 649638110 in words is "six hundred forty-nine million, six hundred thirty-eight thousand, one hundred ten".