40445420 has 12 divisors (see below), whose sum is σ = 84935424. Its totient is φ = 16178160.

The previous prime is 40445417. The next prime is 40445437. The reversal of 40445420 is 2454404.

40445420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011116 + ... + 1011155.

It is an arithmetic number, because the mean of its divisors is an integer number (7077952).

Almost surely, 2^40445420 is an apocalyptic number.

It is an amenable number.

40445420 is an abundant number, since it is smaller than the sum of its proper divisors (44490004).

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

40445420 is a wasteful number, since it uses less digits than its factorization.

40445420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022280 (or 2022278 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 40445420 is about 6359.6713751577. The cubic root of 40445420 is about 343.2599355046.

Adding to 40445420 its reverse (2454404), we get a palindrome (42899824).

The spelling of 40445420 in words is "forty million, four hundred forty-five thousand, four hundred twenty".