400122300440 has 16 divisors (see below), whose sum is σ = 900275176080. Its totient is φ = 160048920160.

The previous prime is 400122300407. The next prime is 400122300443. The reversal of 400122300440 is 44003221004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400122300443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5001528716 + ... + 5001528795.

It is an arithmetic number, because the mean of its divisors is an integer number (56267198505).

Almost surely, 2^400122300440 is an apocalyptic number.

400122300440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400122300440 is an abundant number, since it is smaller than the sum of its proper divisors (500152875640).

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

400122300440 is a wasteful number, since it uses less digits than its factorization.

400122300440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003057522 (or 10003057518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 400122300440 its reverse (44003221004), we get a palindrome (444125521444).

The spelling of 400122300440 in words is "four hundred billion, one hundred twenty-two million, three hundred thousand, four hundred forty".