646092044 has 48 divisors (see below), whose sum is σ = 1263517920. Its totient is φ = 287024640.

The previous prime is 646092023. The next prime is 646092047. The reversal of 646092044 is 440290646.

It is a junction number, because it is equal to n+sod(n) for n = 646091995 and 646092013.

It is not an unprimeable number, because it can be changed into a prime (646092047) by changing a digit.

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, 848624 + ... + 849384.

It is an arithmetic number, because the mean of its divisors is an integer number (26323290).

Almost surely, 2^646092044 is an apocalyptic number.

It is an amenable number.

646092044 is a deficient number, since it is larger than the sum of its proper divisors (617425876).

646092044 is a wasteful number, since it uses less digits than its factorization.

646092044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 1368 counting only the distinct ones).

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

The square root of 646092044 is about 25418.3407011551. The cubic root of 646092044 is about 864.4996020993.

The spelling of 646092044 in words is "six hundred forty-six million, ninety-two thousand, forty-four".