400042222040 has 16 divisors (see below), whose sum is σ = 900094999680. Its totient is φ = 160016888800.

The previous prime is 400042221977. The next prime is 400042222057. The reversal of 400042222040 is 40222240004.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 5000527736 + ... + 5000527815.

It is an arithmetic number, because the mean of its divisors is an integer number (56255937480).

Almost surely, 2^400042222040 is an apocalyptic number.

400042222040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400042222040 is an abundant number, since it is smaller than the sum of its proper divisors (500052777640).

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

400042222040 is a wasteful number, since it uses less digits than its factorization.

400042222040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001055562 (or 10001055558 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 400042222040 its reverse (40222240004), we get a palindrome (440264462044).

The spelling of 400042222040 in words is "four hundred billion, forty-two million, two hundred twenty-two thousand, forty".