40435861 has 4 divisors (see below), whose sum is σ = 40472992. Its totient is φ = 40398732.

The previous prime is 40435853. The next prime is 40435883. The reversal of 40435861 is 16853404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40435861 - 2³ = 40435853 is a prime.

It is a super-2 number, since 2×40435861² = 3270117709622642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40435261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16881 + ... + 19126.

It is an arithmetic number, because the mean of its divisors is an integer number (10118248).

Almost surely, 2^40435861 is an apocalyptic number.

It is an amenable number.

40435861 is a deficient number, since it is larger than the sum of its proper divisors (37131).

40435861 is a wasteful number, since it uses less digits than its factorization.

40435861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37130.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 40435861 is about 6358.9197982047. The cubic root of 40435861 is about 343.2328909900.

The spelling of 40435861 in words is "forty million, four hundred thirty-five thousand, eight hundred sixty-one".