4278890 has 32 divisors (see below), whose sum is σ = 9604224. Its totient is φ = 1333440.

The previous prime is 4278881. The next prime is 4278893. The reversal of 4278890 is 988724.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4278893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2009 + ... + 3548.

It is an arithmetic number, because the mean of its divisors is an integer number (300132).

Almost surely, 2^4278890 is an apocalyptic number.

4278890 is an abundant number, since it is smaller than the sum of its proper divisors (5325334).

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

4278890 is a wasteful number, since it uses less digits than its factorization.

4278890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 4278890 is about 2068.5477997861. The cubic root of 4278890 is about 162.3467905065.

It can be divided in two parts, 4278 and 890, that multiplied together give a triangular number (3807420 = T₂₇₅₉).

The spelling of 4278890 in words is "four million, two hundred seventy-eight thousand, eight hundred ninety".