648402936 has 64 divisors (see below), whose sum is σ = 1714763520. Its totient is φ = 203892480.

The previous prime is 648402893. The next prime is 648402941. The reversal of 648402936 is 639204846.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32251 + ... + 48341.

It is an arithmetic number, because the mean of its divisors is an integer number (26793180).

Almost surely, 2^648402936 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 648402936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857381760).

648402936 is an abundant number, since it is smaller than the sum of its proper divisors (1066360584).

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

648402936 is a wasteful number, since it uses less digits than its factorization.

648402936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16196 (or 16192 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 648402936 is about 25463.7573032732. The cubic root of 648402936 is about 865.5290674504.

It can be divided in two parts, 64840 and 2936, that added together give a palindrome (67776).

The spelling of 648402936 in words is "six hundred forty-eight million, four hundred two thousand, nine hundred thirty-six".