649245834 has 48 divisors (see below), whose sum is σ = 1490929920. Its totient is φ = 209417400.

The previous prime is 649245809. The next prime is 649245847. The reversal of 649245834 is 438542946.

649245834 is a `hidden beast` number, since 6 + 49 + 24 + 583 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 649245834.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45639 + ... + 58149.

It is an arithmetic number, because the mean of its divisors is an integer number (31061040).

Almost surely, 2^649245834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649245834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745464960).

649245834 is an abundant number, since it is smaller than the sum of its proper divisors (841684086).

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

649245834 is a wasteful number, since it uses less digits than its factorization.

649245834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12584 (or 12547 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 649245834 is about 25480.3028631922. The cubic root of 649245834 is about 865.9039561591.

It can be divided in two parts, 6492 and 45834, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 649245834 in words is "six hundred forty-nine million, two hundred forty-five thousand, eight hundred thirty-four".