1994590906 has 16 divisors (see below), whose sum is σ = 3730144320. Its totient is φ = 777113280.

The previous prime is 1994590883. The next prime is 1994590937. The reversal of 1994590906 is 6090954991.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6475791 + ... + 6476098.

It is an arithmetic number, because the mean of its divisors is an integer number (233134020).

Almost surely, 2^1994590906 is an apocalyptic number.

1994590906 is a deficient number, since it is larger than the sum of its proper divisors (1735553414).

1994590906 is a wasteful number, since it uses less digits than its factorization.

1994590906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12951909.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 1994590906 is about 44660.8430954903. The cubic root of 1994590906 is about 1258.7841858120.

It can be divided in two parts, 1994 and 590906, that added together give a square (592900 = 770²).

The spelling of 1994590906 in words is "one billion, nine hundred ninety-four million, five hundred ninety thousand, nine hundred six".