649910140 has 24 divisors (see below), whose sum is σ = 1488885552. Its totient is φ = 236330880.

The previous prime is 649910113. The next prime is 649910179. The reversal of 649910140 is 41019946.

It is a super-3 number, since 3×649910140³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649910096 and 649910105.

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 7 ways as a sum of consecutive naturals, for example, 1476849 + ... + 1477288.

It is an arithmetic number, because the mean of its divisors is an integer number (62036898).

Almost surely, 2^649910140 is an apocalyptic number.

It is an amenable number.

649910140 is an abundant number, since it is smaller than the sum of its proper divisors (838975412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649910140 is a wasteful number, since it uses less digits than its factorization.

649910140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954157 (or 2954155 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 649910140 is about 25493.3352074616. The cubic root of 649910140 is about 866.1991854264.

The spelling of 649910140 in words is "six hundred forty-nine million, nine hundred ten thousand, one hundred forty".