40518380 has 24 divisors (see below), whose sum is σ = 97244448. Its totient is φ = 13891968.

The previous prime is 40518349. The next prime is 40518391. The reversal of 40518380 is 8381504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144569 + ... + 144848.

It is an arithmetic number, because the mean of its divisors is an integer number (4051852).

Almost surely, 2^40518380 is an apocalyptic number.

It is an amenable number.

40518380 is an abundant number, since it is smaller than the sum of its proper divisors (56726068).

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

40518380 is a wasteful number, since it uses less digits than its factorization.

40518380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289433 (or 289431 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 40518380 is about 6365.4049360587. The cubic root of 40518380 is about 343.4662151506.

Adding to 40518380 its reverse (8381504), we get a palindrome (48899884).

The spelling of 40518380 in words is "forty million, five hundred eighteen thousand, three hundred eighty".