40531380 has 48 divisors (see below), whose sum is σ = 113999424. Its totient is φ = 10759680.

The previous prime is 40531373. The next prime is 40531423. The reversal of 40531380 is 8313504.

It is a self number, because there is not a number n which added to its sum of digits gives 40531380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13059 + ... + 15861.

It is an arithmetic number, because the mean of its divisors is an integer number (2374988).

Almost surely, 2^40531380 is an apocalyptic number.

It is an amenable number.

40531380 is an abundant number, since it is smaller than the sum of its proper divisors (73468044).

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

40531380 is a wasteful number, since it uses less digits than its factorization.

40531380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3054 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40531380 is about 6366.4259989416. The cubic root of 40531380 is about 343.5029440241.

Adding to 40531380 its reverse (8313504), we get a palindrome (48844884).

The spelling of 40531380 in words is "forty million, five hundred thirty-one thousand, three hundred eighty".