400422040040 has 64 divisors (see below), whose sum is σ = 982936944000. Its totient is φ = 145595741440.

The previous prime is 400422040013. The next prime is 400422040097. The reversal of 400422040040 is 40040224004.

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

It is a junction number, because it is equal to n+sod(n) for n = 400422039994 and 400422040021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6423341 + ... + 6485379.

It is an arithmetic number, because the mean of its divisors is an integer number (15358389750).

Almost surely, 2^400422040040 is an apocalyptic number.

400422040040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400422040040 is an abundant number, since it is smaller than the sum of its proper divisors (582514903960).

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

400422040040 is a wasteful number, since it uses less digits than its factorization.

400422040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76730 (or 76726 counting only the distinct ones).

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

Adding to 400422040040 its reverse (40040224004), we get a palindrome (440462264044).

The spelling of 400422040040 in words is "four hundred billion, four hundred twenty-two million, forty thousand, forty".