646300440 has 48 divisors (see below), whose sum is σ = 2100477600. Its totient is φ = 172346688.

The previous prime is 646300397. The next prime is 646300453. The reversal of 646300440 is 44003646.

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 11 ways as a sum of consecutive naturals, for example, 897280 + ... + 897999.

It is an arithmetic number, because the mean of its divisors is an integer number (43759950).

Almost surely, 2^646300440 is an apocalyptic number.

646300440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646300440 is an abundant number, since it is smaller than the sum of its proper divisors (1454177160).

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

646300440 is a wasteful number, since it uses less digits than its factorization.

646300440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795296 (or 1795289 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 646300440 is about 25422.4396940970. The cubic root of 646300440 is about 864.5925397823.

The spelling of 646300440 in words is "six hundred forty-six million, three hundred thousand, four hundred forty".