40180840 has 32 divisors (see below), whose sum is σ = 103322880. Its totient is φ = 13776192.

The previous prime is 40180783. The next prime is 40180841. The reversal of 40180840 is 4808104.

It is a super-2 number, since 2×40180840² = 3228999806211200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40180841) 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, 71472 + ... + 72031.

It is an arithmetic number, because the mean of its divisors is an integer number (3228840).

Almost surely, 2^40180840 is an apocalyptic number.

40180840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40180840 is an abundant number, since it is smaller than the sum of its proper divisors (63142040).

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

40180840 is a wasteful number, since it uses less digits than its factorization.

40180840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143521 (or 143517 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 40180840 is about 6338.8358552655. The cubic root of 40180840 is about 342.5098013428.

Adding to 40180840 its reverse (4808104), we get a palindrome (44988944).

The spelling of 40180840 in words is "forty million, one hundred eighty thousand, eight hundred forty".