3978834 has 16 divisors (see below), whose sum is σ = 8048160. Its totient is φ = 1311200.

The previous prime is 3978823. The next prime is 3978841. The reversal of 3978834 is 4388793.

It is a super-2 number, since 2×3978834² = 31662239999112, which contains 22 as substring.

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, 3192 + ... + 4259.

It is an arithmetic number, because the mean of its divisors is an integer number (503010).

Almost surely, 2^3978834 is an apocalyptic number.

3978834 is an abundant number, since it is smaller than the sum of its proper divisors (4069326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3978834 is a wasteful number, since it uses less digits than its factorization.

3978834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545.

The product of its digits is 145152, while the sum is 42.

The square root of 3978834 is about 1994.7014814252. The cubic root of 3978834 is about 158.4596187934.

The spelling of 3978834 in words is "three million, nine hundred seventy-eight thousand, eight hundred thirty-four".