4390988 has 36 divisors (see below), whose sum is σ = 9164232. Its totient is φ = 1834560.

The previous prime is 4390937. The next prime is 4391003. The reversal of 4390988 is 8890934.

It is a super-2 number, since 2×4390988² = 38561551232288, which contains 22 as substring.

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, 8168 + ... + 8688.

It is an arithmetic number, because the mean of its divisors is an integer number (254562).

Almost surely, 2^4390988 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 4390988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4582116).

4390988 is an abundant number, since it is smaller than the sum of its proper divisors (4773244).

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

4390988 is a wasteful number, since it uses less digits than its factorization.

4390988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 4390988 is about 2095.4684440478. The cubic root of 4390988 is about 163.7523030579.

It can be divided in two parts, 43 and 90988, that multiplied together give a square (3912484 = 1978²).

The spelling of 4390988 in words is "four million, three hundred ninety thousand, nine hundred eighty-eight".