3994479890 has 16 divisors (see below), whose sum is σ = 7422001920. Its totient is φ = 1546250160.

The previous prime is 3994479889. The next prime is 3994479959. The reversal of 3994479890 is 989744993.

It is a happy number.

It is a super-2 number, since 2×3994479890² = 31911739183228824200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

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, 6442400 + ... + 6443019.

It is an arithmetic number, because the mean of its divisors is an integer number (463875120).

Almost surely, 2^3994479890 is an apocalyptic number.

3994479890 is a deficient number, since it is larger than the sum of its proper divisors (3427522030).

3994479890 is a wasteful number, since it uses less digits than its factorization.

3994479890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885457.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The square root of 3994479890 is about 63201.8978354290. The cubic root of 3994479890 is about 1586.6704967679.

The spelling of 3994479890 in words is "three billion, nine hundred ninety-four million, four hundred seventy-nine thousand, eight hundred ninety".