40042317 has 16 divisors (see below), whose sum is σ = 61225472. Its totient is φ = 22803120.

The previous prime is 40042313. The next prime is 40042339. The reversal of 40042317 is 71324004.

It is not a de Polignac number, because 40042317 - 2² = 40042313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 40042293 and 40042302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3342 + ... + 9552.

It is an arithmetic number, because the mean of its divisors is an integer number (3826592).

Almost surely, 2^40042317 is an apocalyptic number.

It is an amenable number.

40042317 is a deficient number, since it is larger than the sum of its proper divisors (21183155).

40042317 is a wasteful number, since it uses less digits than its factorization.

40042317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40042317 is about 6327.8998885886. The cubic root of 40042317 is about 342.1157485847.

The spelling of 40042317 in words is "forty million, forty-two thousand, three hundred seventeen".