4421388 has 18 divisors (see below), whose sum is σ = 10333596. Its totient is φ = 1471368.

The previous prime is 4421371. The next prime is 4421407. The reversal of 4421388 is 8831244.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6981 + ... + 7587.

Almost surely, 2^4421388 is an apocalyptic number.

It is an amenable number.

4421388 is an abundant number, since it is smaller than the sum of its proper divisors (5912208).

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

4421388 is an equidigital number, since it uses as much as digits as its factorization.

4421388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 612 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 4421388 is about 2102.7096803886. The cubic root of 4421388 is about 164.1293348194.

It can be divided in two parts, 442 and 1388, that added together give a triangular number (1830 = T₆₀).

The spelling of 4421388 in words is "four million, four hundred twenty-one thousand, three hundred eighty-eight".