649249238 has 16 divisors (see below), whose sum is σ = 1062951120. Its totient is φ = 294962400.

The previous prime is 649249219. The next prime is 649249277. The reversal of 649249238 is 832942946.

649249238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 649249192 and 649249201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44408 + ... + 57188.

It is an arithmetic number, because the mean of its divisors is an integer number (66434445).

Almost surely, 2^649249238 is an apocalyptic number.

649249238 is a deficient number, since it is larger than the sum of its proper divisors (413701882).

649249238 is a wasteful number, since it uses less digits than its factorization.

649249238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15103.

The product of its digits is 746496, while the sum is 47.

The square root of 649249238 is about 25480.3696597989. The cubic root of 649249238 is about 865.9054694698.

The spelling of 649249238 in words is "six hundred forty-nine million, two hundred forty-nine thousand, two hundred thirty-eight".