4243988 has 36 divisors (see below), whose sum is σ = 8809920. Its totient is φ = 1783152.

The previous prime is 4243979. The next prime is 4243991. The reversal of 4243988 is 8893424.

4243988 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×4243988² = 36022868288288, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁷ + 2¹⁵ + 4¹¹ + 3 + 9 + 8 + 8³ .

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, 11381 + ... + 11747.

It is an arithmetic number, because the mean of its divisors is an integer number (244720).

Almost surely, 2^4243988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4243988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4404960).

4243988 is an abundant number, since it is smaller than the sum of its proper divisors (4565932).

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

4243988 is a wasteful number, since it uses less digits than its factorization.

4243988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 435 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 4243988 is about 2060.0941726047. The cubic root of 4243988 is about 161.9041754084.

The spelling of 4243988 in words is "four million, two hundred forty-three thousand, nine hundred eighty-eight".