4388991 has 8 divisors (see below), whose sum is σ = 5863344. Its totient is φ = 2920320.

The previous prime is 4388987. The next prime is 4389017. The reversal of 4388991 is 1998834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4388991 - 2² = 4388987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4388911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (732918).

Almost surely, 2^4388991 is an apocalyptic number.

4388991 is a deficient number, since it is larger than the sum of its proper divisors (1474353).

4388991 is a wasteful number, since it uses less digits than its factorization.

4388991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841.

The product of its digits is 62208, while the sum is 42.

The square root of 4388991 is about 2094.9918854258. The cubic root of 4388991 is about 163.7274747098.

The spelling of 4388991 in words is "four million, three hundred eighty-eight thousand, nine hundred ninety-one".