40105844 has 6 divisors (see below), whose sum is σ = 70185234. Its totient is φ = 20052920.

The previous prime is 40105829. The next prime is 40105861. The reversal of 40105844 is 44850104.

It can be written as a sum of positive squares in only one way, i.e., 33500944 + 6604900 = 5788^2 + 2570^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5013227 + ... + 5013234.

It is an arithmetic number, because the mean of its divisors is an integer number (11697539).

Almost surely, 2^40105844 is an apocalyptic number.

It is an amenable number.

40105844 is a deficient number, since it is larger than the sum of its proper divisors (30079390).

40105844 is a wasteful number, since it uses less digits than its factorization.

40105844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10026465 (or 10026463 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40105844 is about 6332.9174951202. The cubic root of 40105844 is about 342.2965748162.

Adding to 40105844 its reverse (44850104), we get a palindrome (84955948).

The spelling of 40105844 in words is "forty million, one hundred five thousand, eight hundred forty-four".