646424090 has 32 divisors (see below), whose sum is σ = 1293497856. Its totient is φ = 230978880.

The previous prime is 646424069. The next prime is 646424111. The reversal of 646424090 is 90424646.

It is an interprime number because it is at equal distance from previous prime (646424069) and next prime (646424111).

It is a self number, because there is not a number n which added to its sum of digits gives 646424090.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76172 + ... + 84231.

It is an arithmetic number, because the mean of its divisors is an integer number (40421808).

Almost surely, 2^646424090 is an apocalyptic number.

646424090 is an abundant number, since it is smaller than the sum of its proper divisors (647073766).

646424090 is a wasteful number, since it uses less digits than its factorization.

646424090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160454.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 646424090 is about 25424.8714844343. The cubic root of 646424090 is about 864.6476741253.

The spelling of 646424090 in words is "six hundred forty-six million, four hundred twenty-four thousand, ninety".