4388391 has 48 divisors (see below), whose sum is σ = 7879680. Its totient is φ = 2404080.

The previous prime is 4388387. The next prime is 4388393. The reversal of 4388391 is 1938834.

4388391 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4388391 - 2² = 4388387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4388393) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40960 + ... + 41066.

It is an arithmetic number, because the mean of its divisors is an integer number (164160).

Almost surely, 2^4388391 is an apocalyptic number.

4388391 is a deficient number, since it is larger than the sum of its proper divisors (3491289).

4388391 is a wasteful number, since it uses less digits than its factorization.

4388391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 148 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 4388391 is about 2094.8486818861. The cubic root of 4388391 is about 163.7200135445.

The spelling of 4388391 in words is "four million, three hundred eighty-eight thousand, three hundred ninety-one".