646949802 has 32 divisors (see below), whose sum is σ = 1314201600. Its totient is φ = 212282928.

The previous prime is 646949801. The next prime is 646949803. The reversal of 646949802 is 208949646.

It is an interprime number because it is at equal distance from previous prime (646949801) and next prime (646949803).

It is not an unprimeable number, because it can be changed into a prime (646949801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172099 + ... + 175817.

It is an arithmetic number, because the mean of its divisors is an integer number (41068800).

Almost surely, 2^646949802 is an apocalyptic number.

646949802 is an abundant number, since it is smaller than the sum of its proper divisors (667251798).

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

646949802 is a wasteful number, since it uses less digits than its factorization.

646949802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 646949802 is about 25435.2079213047. The cubic root of 646949802 is about 864.8820055787.

The spelling of 646949802 in words is "six hundred forty-six million, nine hundred forty-nine thousand, eight hundred two".