40420044 has 36 divisors (see below), whose sum is σ = 116769744. Its totient is φ = 11548512.

The previous prime is 40420013. The next prime is 40420057. The reversal of 40420044 is 44002404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 40419999 and 40420026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79947 + ... + 80450.

It is an arithmetic number, because the mean of its divisors is an integer number (3243604).

Almost surely, 2^40420044 is an apocalyptic number.

It is an amenable number.

40420044 is an abundant number, since it is smaller than the sum of its proper divisors (76349700).

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

40420044 is a wasteful number, since it uses less digits than its factorization.

40420044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160414 (or 160409 counting only the distinct ones).

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

The square root of 40420044 is about 6357.6759904858. The cubic root of 40420044 is about 343.1881318536.

Adding to 40420044 its reverse (44002404), we get a palindrome (84422448).

The spelling of 40420044 in words is "forty million, four hundred twenty thousand, forty-four".