40117440 has 224 divisors, whose sum is σ = 144840960. Its totient is φ = 9318400.

The previous prime is 40117423. The next prime is 40117447. The reversal of 40117440 is 4471104.

It is not an unprimeable number, because it can be changed into a prime (40117447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306175 + ... + 306305.

Almost surely, 2^40117440 is an apocalyptic number.

40117440 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 40117440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72420480).

40117440 is an abundant number, since it is smaller than the sum of its proper divisors (104723520).

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

40117440 is a wasteful number, since it uses less digits than its factorization.

40117440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 40117440 is about 6333.8329627485. The cubic root of 40117440 is about 342.3295616015.

Adding to 40117440 its reverse (4471104), we get a palindrome (44588544).

The spelling of 40117440 in words is "forty million, one hundred seventeen thousand, four hundred forty".