40861881 has 16 divisors (see below), whose sum is σ = 61305600. Its totient is φ = 26895024.

The previous prime is 40861879. The next prime is 40861883. The reversal of 40861881 is 18816804.

40861881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40861879) and next prime (40861883).

It is not a de Polignac number, because 40861881 - 2¹ = 40861879 is a prime.

It is a super-2 number, since 2×40861881² = 3339386637716322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40861883) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7446 + ... + 11711.

It is an arithmetic number, because the mean of its divisors is an integer number (3831600).

Almost surely, 2^40861881 is an apocalyptic number.

It is an amenable number.

40861881 is a deficient number, since it is larger than the sum of its proper divisors (20443719).

40861881 is a wasteful number, since it uses less digits than its factorization.

40861881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19245 (or 19239 counting only the distinct ones).

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

The square root of 40861881 is about 6392.3298569457. The cubic root of 40861881 is about 344.4340816592.

The spelling of 40861881 in words is "forty million, eight hundred sixty-one thousand, eight hundred eighty-one".