3940280 has 16 divisors (see below), whose sum is σ = 8865720. Its totient is φ = 1576096.

The previous prime is 3940273. The next prime is 3940289. The reversal of 3940280 is 820493.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49214 + ... + 49293.

Almost surely, 2^3940280 is an apocalyptic number.

It is an amenable number.

3940280 is an abundant number, since it is smaller than the sum of its proper divisors (4925440).

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

3940280 is a wasteful number, since it uses less digits than its factorization.

3940280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98518 (or 98514 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3940280 is about 1985.0138538559. The cubic root of 3940280 is about 157.9461441187.

The spelling of 3940280 in words is "three million, nine hundred forty thousand, two hundred eighty".