649798632 has 128 divisors (see below), whose sum is σ = 2171520000. Its totient is φ = 175877568.

The previous prime is 649798607. The next prime is 649798649. The reversal of 649798632 is 236897946.

It is a happy number.

649798632 is a `hidden beast` number, since 6 + 497 + 98 + 63 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17419 + ... + 40037.

It is an arithmetic number, because the mean of its divisors is an integer number (16965000).

Almost surely, 2^649798632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649798632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085760000).

649798632 is an abundant number, since it is smaller than the sum of its proper divisors (1521721368).

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

649798632 is a wasteful number, since it uses less digits than its factorization.

649798632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22660 (or 22650 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 649798632 is about 25491.1481106677. The cubic root of 649798632 is about 866.1496433654.

The spelling of 649798632 in words is "six hundred forty-nine million, seven hundred ninety-eight thousand, six hundred thirty-two".