3998078 has 16 divisors (see below), whose sum is σ = 6881760. Its totient is φ = 1706496.

The previous prime is 3998069. The next prime is 3998089. The reversal of 3998078 is 8708993.

It is a congruent 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, 4538 + ... + 5346.

It is an arithmetic number, because the mean of its divisors is an integer number (430110).

Almost surely, 2^3998078 is an apocalyptic number.

3998078 is a deficient number, since it is larger than the sum of its proper divisors (2883682).

3998078 is a wasteful number, since it uses less digits than its factorization.

3998078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3998078 is about 1999.5194422661. The cubic root of 3998078 is about 158.7146762500.

Subtracting 3998078 from its reverse (8708993), we obtain a triangular number (4710915 = T₃₀₆₉).

The spelling of 3998078 in words is "three million, nine hundred ninety-eight thousand, seventy-eight".