4040021400 has 48 divisors (see below), whose sum is σ = 12524068200. Its totient is φ = 1077338880.

The previous prime is 4040021393. The next prime is 4040021413. The reversal of 4040021400 is 41200404.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 4040021400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3366085 + ... + 3367284.

Almost surely, 2^4040021400 is an apocalyptic number.

4040021400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4040021400 is an abundant number, since it is smaller than the sum of its proper divisors (8484046800).

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

4040021400 is a wasteful number, since it uses less digits than its factorization.

4040021400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733388 (or 6733379 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 4040021400 is about 63561.1626702973. The cubic root of 4040021400 is about 1592.6776605015.

Adding to 4040021400 its reverse (41200404), we get a palindrome (4081221804).

The spelling of 4040021400 in words is "four billion, forty million, twenty-one thousand, four hundred".