40818861 has 12 divisors (see below), whose sum is σ = 59569692. Its totient is φ = 26931456.

The previous prime is 40818857. The next prime is 40818907. The reversal of 40818861 is 16881804.

It can be written as a sum of positive squares in 2 ways, for example, as 29224836 + 11594025 = 5406^2 + 3405^2 .

It is not a de Polignac number, because 40818861 - 2² = 40818857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40818761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22506 + ... + 24251.

It is an arithmetic number, because the mean of its divisors is an integer number (4964141).

Almost surely, 2^40818861 is an apocalyptic number.

It is an amenable number.

40818861 is a deficient number, since it is larger than the sum of its proper divisors (18750831).

40818861 is a wasteful number, since it uses less digits than its factorization.

40818861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46860 (or 46857 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 40818861 is about 6388.9640005247. The cubic root of 40818861 is about 344.3131640956.

The spelling of 40818861 in words is "forty million, eight hundred eighteen thousand, eight hundred sixty-one".