4247388 has 36 divisors (see below), whose sum is σ = 10832640. Its totient is φ = 1403136.

The previous prime is 4247381. The next prime is 4247389. The reversal of 4247388 is 8837424.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 4³ + 2¹⁵ + 4¹¹ + 7² + 3⁹ + 8 + 8³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4247381) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4108 + ... + 5036.

Almost surely, 2^4247388 is an apocalyptic number.

It is an amenable number.

4247388 is an abundant number, since it is smaller than the sum of its proper divisors (6585252).

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

4247388 is a wasteful number, since it uses less digits than its factorization.

4247388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1061 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 4247388 is about 2060.9192123904. The cubic root of 4247388 is about 161.9473994751.

Adding to 4247388 its sum of digits (36), we get a palindrome (4247424).

The spelling of 4247388 in words is "four million, two hundred forty-seven thousand, three hundred eighty-eight".