1994308978 has 16 divisors (see below), whose sum is σ = 3134941056. Its totient is φ = 949701280.

The previous prime is 1994308919. The next prime is 1994308993. The reversal of 1994308978 is 8798034991.

It is a happy 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, 82318 + ... + 103753.

It is an arithmetic number, because the mean of its divisors is an integer number (195933816).

Almost surely, 2^1994308978 is an apocalyptic number.

1994308978 is a deficient number, since it is larger than the sum of its proper divisors (1140632078).

1994308978 is a wasteful number, since it uses less digits than its factorization.

1994308978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186329.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 1994308978 is about 44657.6866619846. The cubic root of 1994308978 is about 1258.7248748645.

The spelling of 1994308978 in words is "one billion, nine hundred ninety-four million, three hundred eight thousand, nine hundred seventy-eight".