1994890394 has 16 divisors (see below), whose sum is σ = 3422467968. Its totient is φ = 854289072.

The previous prime is 1994890369. The next prime is 1994890421. The reversal of 1994890394 is 4930984991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36437 + ... + 72920.

It is an arithmetic number, because the mean of its divisors is an integer number (213904248).

Almost surely, 2^1994890394 is an apocalyptic number.

1994890394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1994890394 is a deficient number, since it is larger than the sum of its proper divisors (1427577574).

1994890394 is a wasteful number, since it uses less digits than its factorization.

1994890394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110669.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The square root of 1994890394 is about 44664.1958843994. The cubic root of 1994890394 is about 1258.8471848445.

The spelling of 1994890394 in words is "one billion, nine hundred ninety-four million, eight hundred ninety thousand, three hundred ninety-four".