40400022042 has 12 divisors (see below), whose sum is σ = 87533381130. Its totient is φ = 13466674008.

The previous prime is 40400021983. The next prime is 40400022049. The reversal of 40400022042 is 24022000404.

40400022042 is a `hidden beast` number, since 4 + 0 + 400 + 0 + 220 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22551329241 + 17848692801 = 150171^2 + 133599^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2244445669 = 40400022042 / (4 + 0 + 4 + 0 + 0 + 0 + 2 + 2 + 0 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (40400022049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122222817 + ... + 1122222852.

Almost surely, 2^40400022042 is an apocalyptic number.

40400022042 is an abundant number, since it is smaller than the sum of its proper divisors (47133359088).

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

40400022042 is a wasteful number, since it uses less digits than its factorization.

40400022042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244445677 (or 2244445674 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 40400022042 its reverse (24022000404), we get a palindrome (64422022446).

The spelling of 40400022042 in words is "forty billion, four hundred million, twenty-two thousand, forty-two".