40436881 has 3 divisors (see below), whose sum is σ = 40443241. Its totient is φ = 40430522.

The previous prime is 40436867. The next prime is 40436909. The reversal of 40436881 is 18863404.

The square root of 40436881 is 6359.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 40436881 - 2⁵ = 40436849 is a prime.

It is a super-2 number, since 2×40436881² = 3270282690016322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40436821) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3180 + ... + 9538.

Almost surely, 2^40436881 is an apocalyptic number.

40436881 is the 6359-th square number.

40436881 is the 3180-th centered octagonal number.

It is an amenable number.

40436881 is a deficient number, since it is larger than the sum of its proper divisors (6360).

40436881 is an frugal number, since it uses more digits than its factorization.

40436881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12718 (or 6359 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The cubic root of 40436881 is about 343.2357769976.

It can be divided in two parts, 40 and 436881, that added together give a square (436921 = 661²).

The spelling of 40436881 in words is "forty million, four hundred thirty-six thousand, eight hundred eighty-one".