1640796 has 12 divisors (see below), whose sum is σ = 3828552. Its totient is φ = 546928.

The previous prime is 1640773. The next prime is 1640803. The reversal of 1640796 is 6970461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68355 + ... + 68378.

It is an arithmetic number, because the mean of its divisors is an integer number (319046).

2^1640796 is an apocalyptic number.

It is an amenable number.

1640796 is an abundant number, since it is smaller than the sum of its proper divisors (2187756).

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

1640796 is a wasteful number, since it uses less digits than its factorization.

1640796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136740 (or 136738 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1640796 is about 1280.9355955707. The cubic root of 1640796 is about 117.9464470198.

The spelling of 1640796 in words is "one million, six hundred forty thousand, seven hundred ninety-six".