3998768426 has 8 divisors (see below), whose sum is σ = 5999616324. Its totient is φ = 1998896320.

The previous prime is 3998768401. The next prime is 3998768479. The reversal of 3998768426 is 6248678993.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3962828401 + 35940025 = 62951^2 + 5995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 233615 + ... + 250146.

Almost surely, 2^3998768426 is an apocalyptic number.

3998768426 is a deficient number, since it is larger than the sum of its proper divisors (2000847898).

3998768426 is a wasteful number, since it uses less digits than its factorization.

3998768426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487896.

The product of its digits is 31352832, while the sum is 62.

The square root of 3998768426 is about 63235.8160064374. The cubic root of 3998768426 is about 1587.2381184231.

The spelling of 3998768426 in words is "three billion, nine hundred ninety-eight million, seven hundred sixty-eight thousand, four hundred twenty-six".