400022010 has 64 divisors (see below), whose sum is σ = 1122883200. Its totient is φ = 101056896.

The previous prime is 400021987. The next prime is 400022017. The reversal of 400022010 is 10220004.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 400021983 and 400022001.

It is not an unprimeable number, because it can be changed into a prime (400022017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33859 + ... + 44118.

It is an arithmetic number, because the mean of its divisors is an integer number (17545050).

Almost surely, 2^400022010 is an apocalyptic number.

400022010 is an abundant number, since it is smaller than the sum of its proper divisors (722861190).

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

400022010 is a wasteful number, since it uses less digits than its factorization.

400022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78012 (or 78006 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 400022010 is about 20000.5502424308. The cubic root of 400022010 is about 736.8198137358.

Adding to 400022010 its reverse (10220004), we get a palindrome (410242014).

The spelling of 400022010 in words is "four hundred million, twenty-two thousand, ten".