1640353 has 8 divisors (see below), whose sum is σ = 1927296. Its totient is φ = 1376400.

The previous prime is 1640333. The next prime is 1640393. The reversal of 1640353 is 3530461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640353 is a prime.

It is a Duffinian number.

1640353 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1640323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593 + ... + 5878.

It is an arithmetic number, because the mean of its divisors is an integer number (240912).

2^1640353 is an apocalyptic number.

1640353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1640353 is a deficient number, since it is larger than the sum of its proper divisors (286943).

1640353 is a wasteful number, since it uses less digits than its factorization.

1640353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11495.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1640353 is about 1280.7626634158. The cubic root of 1640353 is about 117.9358312416.

The spelling of 1640353 in words is "one million, six hundred forty thousand, three hundred fifty-three".