649411940 has 24 divisors (see below), whose sum is σ = 1369730040. Its totient is φ = 258628608.

The previous prime is 649411927. The next prime is 649411967. The reversal of 649411940 is 49114946.

It can be written as a sum of positive squares in 4 ways, for example, as 155950144 + 493461796 = 12488^2 + 22214^2 .

It is a junction number, because it is equal to n+sod(n) for n = 649411894 and 649411903.

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, 66317 + ... + 75476.

It is an arithmetic number, because the mean of its divisors is an integer number (57072085).

Almost surely, 2^649411940 is an apocalyptic number.

It is an amenable number.

649411940 is an abundant number, since it is smaller than the sum of its proper divisors (720318100).

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

649411940 is a wasteful number, since it uses less digits than its factorization.

649411940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142031 (or 142029 counting only the distinct ones).

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

The square root of 649411940 is about 25483.5621528859. The cubic root of 649411940 is about 865.9777954614.

The spelling of 649411940 in words is "six hundred forty-nine million, four hundred eleven thousand, nine hundred forty".