1605896994 has 16 divisors (see below), whose sum is σ = 3458855232. Its totient is φ = 494122128.

The previous prime is 1605896989. The next prime is 1605897019. The reversal of 1605896994 is 4996985061.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10294134 + ... + 10294289.

It is an arithmetic number, because the mean of its divisors is an integer number (216178452).

Almost surely, 2^1605896994 is an apocalyptic number.

1605896994 is an abundant number, since it is smaller than the sum of its proper divisors (1852958238).

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

1605896994 is a wasteful number, since it uses less digits than its factorization.

1605896994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20588441.

The product of its (nonzero) digits is 4199040, while the sum is 57.

The square root of 1605896994 is about 40073.6446308543. The cubic root of 1605896994 is about 1171.0422431775.

The spelling of 1605896994 in words is "one billion, six hundred five million, eight hundred ninety-six thousand, nine hundred ninety-four".