4240389621 has 32 divisors (see below), whose sum is σ = 6128898048. Its totient is φ = 2592342720.

The previous prime is 4240389589. The next prime is 4240389623. The reversal of 4240389621 is 1269830424.

It is not a de Polignac number, because 4240389621 - 2⁵ = 4240389589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 4240389621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240389623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5832360 + ... + 5833086.

It is an arithmetic number, because the mean of its divisors is an integer number (191528064).

Almost surely, 2^4240389621 is an apocalyptic number.

It is an amenable number.

4240389621 is a deficient number, since it is larger than the sum of its proper divisors (1888508427).

4240389621 is a wasteful number, since it uses less digits than its factorization.

4240389621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 4240389621 is about 65118.2740941435. The cubic root of 4240389621 is about 1618.5840420471.

The spelling of 4240389621 in words is "four billion, two hundred forty million, three hundred eighty-nine thousand, six hundred twenty-one".