646103940 has 48 divisors (see below), whose sum is σ = 1812948480. Its totient is φ = 171927040.

The previous prime is 646103933. The next prime is 646103993. The reversal of 646103940 is 49301646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17500 + ... + 39980.

It is an arithmetic number, because the mean of its divisors is an integer number (37769760).

Almost surely, 2^646103940 is an apocalyptic number.

646103940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646103940 is an abundant number, since it is smaller than the sum of its proper divisors (1166844540).

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

646103940 is a wasteful number, since it uses less digits than its factorization.

646103940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22972 (or 22970 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 646103940 is about 25418.5747043378. The cubic root of 646103940 is about 864.5049078574.

The spelling of 646103940 in words is "six hundred forty-six million, one hundred three thousand, nine hundred forty".