3978485 has 16 divisors (see below), whose sum is σ = 5536512. Its totient is φ = 2688000.

The previous prime is 3978479. The next prime is 3978497. The reversal of 3978485 is 5848793.

3978485 = 320² + 321² + ... + 354².

It is not a de Polignac number, because 3978485 - 2⁶ = 3978421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685 + ... + 3285.

It is an arithmetic number, because the mean of its divisors is an integer number (346032).

Almost surely, 2^3978485 is an apocalyptic number.

3978485 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3978485 is a deficient number, since it is larger than the sum of its proper divisors (1558027).

3978485 is a wasteful number, since it uses less digits than its factorization.

3978485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684.

The product of its digits is 241920, while the sum is 44.

The square root of 3978485 is about 1994.6139977449. The cubic root of 3978485 is about 158.4549856082.

The spelling of 3978485 in words is "three million, nine hundred seventy-eight thousand, four hundred eighty-five".