1994540104 has 8 divisors (see below), whose sum is σ = 3739762710. Its totient is φ = 997270048.

The previous prime is 1994540099. The next prime is 1994540111. The reversal of 1994540104 is 4010454991.

It can be written as a sum of positive squares in only one way, i.e., 1089132004 + 905408100 = 33002^2 + 30090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124658749 + ... + 124658764.

Almost surely, 2^1994540104 is an apocalyptic number.

It is an amenable number.

1994540104 is a deficient number, since it is larger than the sum of its proper divisors (1745222606).

1994540104 is a wasteful number, since it uses less digits than its factorization.

1994540104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249317519 (or 249317515 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1994540104 is about 44660.2743386110. The cubic root of 1994540104 is about 1258.7734986920.

The spelling of 1994540104 in words is "one billion, nine hundred ninety-four million, five hundred forty thousand, one hundred four".