40117518 has 80 divisors (see below), whose sum is σ = 108830304. Its totient is φ = 10782720.

The previous prime is 40117499. The next prime is 40117537. The reversal of 40117518 is 81571104.

It is an interprime number because it is at equal distance from previous prime (40117499) and next prime (40117537).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40117491 and 40117500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18238 + ... + 20318.

Almost surely, 2^40117518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40117518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54415152).

40117518 is an abundant number, since it is smaller than the sum of its proper divisors (68712786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40117518 is a wasteful number, since it uses less digits than its factorization.

40117518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 40117518 is about 6333.8391201545. The cubic root of 40117518 is about 342.3297834642.

The spelling of 40117518 in words is "forty million, one hundred seventeen thousand, five hundred eighteen".