1640622342 has 8 divisors (see below), whose sum is σ = 3281244696. Its totient is φ = 546874112.

The previous prime is 1640622311. The next prime is 1640622371. The reversal of 1640622342 is 2432260461.

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

1640622342 is an admirable number.

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, 136718523 + ... + 136718534.

It is an arithmetic number, because the mean of its divisors is an integer number (410155587).

Almost surely, 2^1640622342 is an apocalyptic number.

1640622342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1640622342 is a wasteful number, since it uses less digits than its factorization.

1640622342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273437062.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1640622342 is about 40504.5965539715. The cubic root of 1640622342 is about 1179.4228581452.

The spelling of 1640622342 in words is "one billion, six hundred forty million, six hundred twenty-two thousand, three hundred forty-two".