400450122 has 16 divisors (see below), whose sum is σ = 889889280. Its totient is φ = 133483356.

The previous prime is 400450121. The next prime is 400450129. The reversal of 400450122 is 221054004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 400450095 and 400450104.

It is not an unprimeable number, because it can be changed into a prime (400450121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3707818 + ... + 3707925.

It is an arithmetic number, because the mean of its divisors is an integer number (55618080).

Almost surely, 2^400450122 is an apocalyptic number.

400450122 is an abundant number, since it is smaller than the sum of its proper divisors (489439158).

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

400450122 is a wasteful number, since it uses less digits than its factorization.

400450122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7415754 (or 7415748 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 400450122 is about 20011.2498860016. The cubic root of 400450122 is about 737.0825733943.

The spelling of 400450122 in words is "four hundred million, four hundred fifty thousand, one hundred twenty-two".