40388516 has 24 divisors (see below), whose sum is σ = 80922240. Its totient is φ = 17278272.

The previous prime is 40388507. The next prime is 40388519. The reversal of 40388516 is 61588304.

It is not an unprimeable number, because it can be changed into a prime (40388519) 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, 21761 + ... + 23543.

It is an arithmetic number, because the mean of its divisors is an integer number (3371760).

Almost surely, 2^40388516 is an apocalyptic number.

It is an amenable number.

40388516 is an abundant number, since it is smaller than the sum of its proper divisors (40533724).

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

40388516 is a wasteful number, since it uses less digits than its factorization.

40388516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603 (or 2601 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 40388516 is about 6355.1959843895. The cubic root of 40388516 is about 343.0988786943.

It can be divided in two parts, 40388 and 516, that added together give a palindrome (40904).

The spelling of 40388516 in words is "forty million, three hundred eighty-eight thousand, five hundred sixteen".