400244022040 has 64 divisors (see below), whose sum is σ = 905631528960. Its totient is φ = 159194743680.

The previous prime is 400244022001. The next prime is 400244022041. The reversal of 400244022040 is 40220442004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400244022041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21711307 + ... + 21729733.

It is an arithmetic number, because the mean of its divisors is an integer number (14150492640).

Almost surely, 2^400244022040 is an apocalyptic number.

400244022040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400244022040 is an abundant number, since it is smaller than the sum of its proper divisors (505387506920).

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

400244022040 is a wasteful number, since it uses less digits than its factorization.

400244022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21472 (or 21468 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 400244022040 its reverse (40220442004), we get a palindrome (440464464044).

The spelling of 400244022040 in words is "four hundred billion, two hundred forty-four million, twenty-two thousand, forty".