646347030 has 64 divisors (see below), whose sum is σ = 1783185408. Its totient is φ = 146874240.

The previous prime is 646347019. The next prime is 646347071. The reversal of 646347030 is 30743646.

It is a junction number, because it is equal to n+sod(n) for n = 646346982 and 646347000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27435 + ... + 45225.

It is an arithmetic number, because the mean of its divisors is an integer number (27862272).

Almost surely, 2^646347030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646347030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891592704).

646347030 is an abundant number, since it is smaller than the sum of its proper divisors (1136838378).

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

646347030 is a wasteful number, since it uses less digits than its factorization.

646347030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17981.

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 646347030 is about 25423.3559940461. The cubic root of 646347030 is about 864.6133146397.

The spelling of 646347030 in words is "six hundred forty-six million, three hundred forty-seven thousand, thirty".