3980978 has 16 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 1851696.

The previous prime is 3980971. The next prime is 3980987. The reversal of 3980978 is 8790893.

3980978 = T₁₂ + T₁₃ + ... + T₂₈₇.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3980971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (400140).

Almost surely, 2^3980978 is an apocalyptic number.

3980978 is the 1067-th centered heptagonal number.

3980978 is a deficient number, since it is larger than the sum of its proper divisors (2421262).

3980978 is a wasteful number, since it uses less digits than its factorization.

3980978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401.

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

The square root of 3980978 is about 1995.2388328218. The cubic root of 3980978 is about 158.4880757415.

The spelling of 3980978 in words is "three million, nine hundred eighty thousand, nine hundred seventy-eight".