4006440700 has 36 divisors (see below), whose sum is σ = 9151558360. Its totient is φ = 1518229440.

The previous prime is 4006440673. The next prime is 4006440701. The reversal of 4006440700 is 70446004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006440701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1052427 + ... + 1056226.

Almost surely, 2^4006440700 is an apocalyptic number.

It is an amenable number.

4006440700 is an abundant number, since it is smaller than the sum of its proper divisors (5145117660).

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

4006440700 is a wasteful number, since it uses less digits than its factorization.

4006440700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108686 (or 2108679 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 4006440700 is about 63296.4509273624. The cubic root of 4006440700 is about 1588.2525929179.

Adding to 4006440700 its reverse (70446004), we get a palindrome (4076886704).

The spelling of 4006440700 in words is "four billion, six million, four hundred forty thousand, seven hundred".