648386446 has 32 divisors (see below), whose sum is σ = 1021184640. Its totient is φ = 308448000.

The previous prime is 648386441. The next prime is 648386461. The reversal of 648386446 is 644683846.

It is a happy number.

It is a super-3 number, since 3×648386446³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648386446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648386441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078546 + ... + 1079146.

It is an arithmetic number, because the mean of its divisors is an integer number (31912020).

Almost surely, 2^648386446 is an apocalyptic number.

648386446 is a deficient number, since it is larger than the sum of its proper divisors (372798194).

648386446 is a wasteful number, since it uses less digits than its factorization.

648386446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940.

The product of its digits is 2654208, while the sum is 49.

The square root of 648386446 is about 25463.4335076792. The cubic root of 648386446 is about 865.5217300915.

It can be divided in two parts, 6483 and 86446, that added together give a palindrome (92929).

The spelling of 648386446 in words is "six hundred forty-eight million, three hundred eighty-six thousand, four hundred forty-six".