40889645 has 4 divisors (see below), whose sum is σ = 49067580. Its totient is φ = 32711712.

The previous prime is 40889633. The next prime is 40889677. The reversal of 40889645 is 54698804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6620329 + 34269316 = 2573^2 + 5854^2 .

It is a cyclic number.

It is not a de Polignac number, because 40889645 - 2¹⁶ = 40824109 is a prime.

It is a super-3 number, since 3×40889645³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40889596 and 40889605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4088960 + ... + 4088969.

It is an arithmetic number, because the mean of its divisors is an integer number (12266895).

Almost surely, 2^40889645 is an apocalyptic number.

It is an amenable number.

40889645 is a deficient number, since it is larger than the sum of its proper divisors (8177935).

40889645 is an equidigital number, since it uses as much as digits as its factorization.

40889645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8177934.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 40889645 is about 6394.5011533348. The cubic root of 40889645 is about 344.5120736863.

The spelling of 40889645 in words is "forty million, eight hundred eighty-nine thousand, six hundred forty-five".