40388500 has 24 divisors (see below), whose sum is σ = 88209576. Its totient is φ = 16155200.

The previous prime is 40388489. The next prime is 40388507. The reversal of 40388500 is 588304.

It can be written as a sum of positive squares in 4 ways, for example, as 799236 + 39589264 = 894^2 + 6292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40388507) 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, 39889 + ... + 40888.

It is an arithmetic number, because the mean of its divisors is an integer number (3675399).

Almost surely, 2^40388500 is an apocalyptic number.

It is an amenable number.

40388500 is an abundant number, since it is smaller than the sum of its proper divisors (47821076).

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

40388500 is a wasteful number, since it uses less digits than its factorization.

40388500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80796 (or 80784 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40388500 is about 6355.1947255769. The cubic root of 40388500 is about 343.0988333878.

The spelling of 40388500 in words is "forty million, three hundred eighty-eight thousand, five hundred".