649505304 has 240 divisors, whose sum is σ = 2162754000. Its totient is φ = 178381440.

The previous prime is 649505299. The next prime is 649505371. The reversal of 649505304 is 403505946.

It is a happy number.

649505304 is a `hidden beast` number, since 649 + 5 + 0 + 5 + 3 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4359022 + ... + 4359170.

It is an arithmetic number, because the mean of its divisors is an integer number (9011475).

Almost surely, 2^649505304 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 649505304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081377000).

649505304 is an abundant number, since it is smaller than the sum of its proper divisors (1513248696).

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

649505304 is a wasteful number, since it uses less digits than its factorization.

649505304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 649505304 is about 25485.3939345657. The cubic root of 649505304 is about 866.0192931465.

The spelling of 649505304 in words is "six hundred forty-nine million, five hundred five thousand, three hundred four".