400021140244 has 12 divisors (see below), whose sum is σ = 763676722368. Its totient is φ = 181827791000.

The previous prime is 400021140227. The next prime is 400021140341. The reversal of 400021140244 is 442041120004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545694732 + ... + 4545694819.

It is an arithmetic number, because the mean of its divisors is an integer number (63639726864).

Almost surely, 2^400021140244 is an apocalyptic number.

400021140244 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400021140244 is a deficient number, since it is larger than the sum of its proper divisors (363655582124).

400021140244 is a wasteful number, since it uses less digits than its factorization.

400021140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091389566 (or 9091389564 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 400021140244 its reverse (442041120004), we get a palindrome (842062260248).

The spelling of 400021140244 in words is "four hundred billion, twenty-one million, one hundred forty thousand, two hundred forty-four".