1640874246 has 32 divisors (see below), whose sum is σ = 3656268288. Its totient is φ = 486654240.

The previous prime is 1640874239. The next prime is 1640874269. The reversal of 1640874246 is 6424780461.

It is a junction number, because it is equal to n+sod(n) for n = 1640874198 and 1640874207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261385 + ... + 267588.

It is an arithmetic number, because the mean of its divisors is an integer number (114258384).

Almost surely, 2^1640874246 is an apocalyptic number.

1640874246 is an abundant number, since it is smaller than the sum of its proper divisors (2015394042).

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

1640874246 is a wasteful number, since it uses less digits than its factorization.

1640874246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529036.

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 1640874246 is about 40507.7060076228. The cubic root of 1640874246 is about 1179.4832185998.

The spelling of 1640874246 in words is "one billion, six hundred forty million, eight hundred seventy-four thousand, two hundred forty-six".