40877861 has 4 divisors (see below), whose sum is σ = 41874924. Its totient is φ = 39880800.

The previous prime is 40877833. The next prime is 40877867. The reversal of 40877861 is 16877804.

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 8444836 + 32433025 = 2906^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 40877861 - 2¹⁴ = 40861477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 997021 = 40877861 / (4 + 0 + 8 + 7 + 7 + 8 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40877867) by changing a digit.

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, 498470 + ... + 498551.

It is an arithmetic number, because the mean of its divisors is an integer number (10468731).

Almost surely, 2^40877861 is an apocalyptic number.

40877861 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40877861 is a deficient number, since it is larger than the sum of its proper divisors (997063).

40877861 is an equidigital number, since it uses as much as digits as its factorization.

40877861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997062.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 40877861 is about 6393.5796702630. The cubic root of 40877861 is about 344.4789754913.

The spelling of 40877861 in words is "forty million, eight hundred seventy-seven thousand, eight hundred sixty-one".