646389102 has 32 divisors (see below), whose sum is σ = 1350961920. Its totient is φ = 205793280.

The previous prime is 646389097. The next prime is 646389109. The reversal of 646389102 is 201983646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646389109) 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, 103077 + ... + 109167.

It is an arithmetic number, because the mean of its divisors is an integer number (42217560).

Almost surely, 2^646389102 is an apocalyptic number.

646389102 is an abundant number, since it is smaller than the sum of its proper divisors (704572818).

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

646389102 is a wasteful number, since it uses less digits than its factorization.

646389102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 646389102 is about 25424.1834087154. The cubic root of 646389102 is about 864.6320740267.

The spelling of 646389102 in words is "six hundred forty-six million, three hundred eighty-nine thousand, one hundred two".