40400022 has 16 divisors (see below), whose sum is σ = 87015600. Its totient is φ = 12430752.

The previous prime is 40400021. The next prime is 40400027. The reversal of 40400022 is 22000404.

It is a junction number, because it is equal to n+sod(n) for n = 40399980 and 40400007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400021) 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, 258897 + ... + 259052.

It is an arithmetic number, because the mean of its divisors is an integer number (5438475).

Almost surely, 2^40400022 is an apocalyptic number.

40400022 is an abundant number, since it is smaller than the sum of its proper divisors (46615578).

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

40400022 is a wasteful number, since it uses less digits than its factorization.

40400022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517967.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 40400022 is about 6356.1011634492. The cubic root of 40400022 is about 343.1314566089.

Adding to 40400022 its reverse (22000404), we get a palindrome (62400426).

The spelling of 40400022 in words is "forty million, four hundred thousand, twenty-two".