40117820 has 24 divisors (see below), whose sum is σ = 85839264. Its totient is φ = 15743936.

The previous prime is 40117811. The next prime is 40117829. The reversal of 40117820 is 2871104.

It is an interprime number because it is at equal distance from previous prime (40117811) and next prime (40117829).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40117829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17864 + ... + 19983.

It is an arithmetic number, because the mean of its divisors is an integer number (3576636).

Almost surely, 2^40117820 is an apocalyptic number.

It is an amenable number.

40117820 is an abundant number, since it is smaller than the sum of its proper divisors (45721444).

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

40117820 is a wasteful number, since it uses less digits than its factorization.

40117820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37909 (or 37907 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 40117820 is about 6333.8629603110. The cubic root of 40117820 is about 342.3306424683.

Adding to 40117820 its reverse (2871104), we get a palindrome (42988924).

The spelling of 40117820 in words is "forty million, one hundred seventeen thousand, eight hundred twenty".