40538845 has 4 divisors (see below), whose sum is σ = 48646620. Its totient is φ = 32431072.

The previous prime is 40538833. The next prime is 40538881. The reversal of 40538845 is 54883504.

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 13227769 + 27311076 = 3637^2 + 5226^2 .

It is a cyclic number.

It is not a de Polignac number, because 40538845 - 2¹⁵ = 40506077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4053880 + ... + 4053889.

It is an arithmetic number, because the mean of its divisors is an integer number (12161655).

Almost surely, 2^40538845 is an apocalyptic number.

It is an amenable number.

40538845 is a deficient number, since it is larger than the sum of its proper divisors (8107775).

40538845 is an equidigital number, since it uses as much as digits as its factorization.

40538845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8107774.

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 40538845 is about 6367.0122506557. The cubic root of 40538845 is about 343.5240313237.

The spelling of 40538845 in words is "forty million, five hundred thirty-eight thousand, eight hundred forty-five".