1640332914 has 32 divisors (see below), whose sum is σ = 3675640896. Its totient is φ = 483635520.

The previous prime is 1640332913. The next prime is 1640332949. The reversal of 1640332914 is 4192330461.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1640332913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333417 + ... + 338300.

It is an arithmetic number, because the mean of its divisors is an integer number (114863778).

Almost surely, 2^1640332914 is an apocalyptic number.

1640332914 is an abundant number, since it is smaller than the sum of its proper divisors (2035307982).

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

1640332914 is a wasteful number, since it uses less digits than its factorization.

1640332914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671770.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1640332914 is about 40501.0236166939. The cubic root of 1640332914 is about 1179.3534986780.

The spelling of 1640332914 in words is "one billion, six hundred forty million, three hundred thirty-two thousand, nine hundred fourteen".