40259863 has 8 divisors (see below), whose sum is σ = 46176128. Its totient is φ = 34384824.

The previous prime is 40259851. The next prime is 40259873. The reversal of 40259863 is 36895204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40259863 - 2²¹ = 38162711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40259833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8181 + ... + 12142.

It is an arithmetic number, because the mean of its divisors is an integer number (5772016).

Almost surely, 2^40259863 is an apocalyptic number.

40259863 is a deficient number, since it is larger than the sum of its proper divisors (5916265).

40259863 is a wasteful number, since it uses less digits than its factorization.

40259863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20613.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 40259863 is about 6345.0660359054. The cubic root of 40259863 is about 342.7341904452.

It can be divided in two parts, 40 and 259863, that multiplied together give a triangular number (10394520 = T₄₅₅₉).

The spelling of 40259863 in words is "forty million, two hundred fifty-nine thousand, eight hundred sixty-three".