40117320 has 96 divisors (see below), whose sum is σ = 133211520. Its totient is φ = 10465920.

The previous prime is 40117307. The next prime is 40117327. The reversal of 40117320 is 2371104.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40117293 and 40117302.

It is not an unprimeable number, because it can be changed into a prime (40117327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15735 + ... + 18105.

It is an arithmetic number, because the mean of its divisors is an integer number (1387620).

Almost surely, 2^40117320 is an apocalyptic number.

40117320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40117320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66605760).

40117320 is an abundant number, since it is smaller than the sum of its proper divisors (93094200).

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

40117320 is a wasteful number, since it uses less digits than its factorization.

40117320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40117320 is about 6333.8234898046. The cubic root of 40117320 is about 342.3292202737.

Adding to 40117320 its reverse (2371104), we get a palindrome (42488424).

The spelling of 40117320 in words is "forty million, one hundred seventeen thousand, three hundred twenty".