3875220 has 36 divisors (see below), whose sum is σ = 11755380. Its totient is φ = 1033344.

The previous prime is 3875177. The next prime is 3875239. The reversal of 3875220 is 225783.

It can be written as a sum of positive squares in 2 ways, for example, as 992016 + 2883204 = 996^2 + 1698^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10585 + ... + 10944.

Almost surely, 2^3875220 is an apocalyptic number.

3875220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3875220 is an abundant number, since it is smaller than the sum of its proper divisors (7880160).

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

3875220 is a wasteful number, since it uses less digits than its factorization.

3875220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21544 (or 21539 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 3875220 is about 1968.5578477657. The cubic root of 3875220 is about 157.0720050525.

It can be divided in two parts, 3875 and 220, that added together give a triangular number (4095 = T₉₀).

The spelling of 3875220 in words is "three million, eight hundred seventy-five thousand, two hundred twenty".