649825376 has 48 divisors (see below), whose sum is σ = 1318270464. Its totient is φ = 315085824.

The previous prime is 649825373. The next prime is 649825381. The reversal of 649825376 is 673528946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649825373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452756 + ... + 454188.

It is an arithmetic number, because the mean of its divisors is an integer number (27463968).

Almost surely, 2^649825376 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 649825376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659135232).

649825376 is an abundant number, since it is smaller than the sum of its proper divisors (668445088).

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

649825376 is a wasteful number, since it uses less digits than its factorization.

649825376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863 (or 1855 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The square root of 649825376 is about 25491.6726795242. The cubic root of 649825376 is about 866.1615260150.

The spelling of 649825376 in words is "six hundred forty-nine million, eight hundred twenty-five thousand, three hundred seventy-six".