1640888346 has 32 divisors (see below), whose sum is σ = 3370429440. Its totient is φ = 532318256.

The previous prime is 1640888339. The next prime is 1640888363. The reversal of 1640888346 is 6438880461.

1640888346 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1640888295 and 1640888304.

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, 34225 + ... + 66731.

It is an arithmetic number, because the mean of its divisors is an integer number (105325920).

Almost surely, 2^1640888346 is an apocalyptic number.

1640888346 is an abundant number, since it is smaller than the sum of its proper divisors (1729541094).

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

1640888346 is a wasteful number, since it uses less digits than its factorization.

1640888346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32738.

The product of its (nonzero) digits is 884736, while the sum is 48.

The square root of 1640888346 is about 40507.8800482079. The cubic root of 1640888346 is about 1179.4865970154.

The spelling of 1640888346 in words is "one billion, six hundred forty million, eight hundred eighty-eight thousand, three hundred forty-six".