40389540 has 48 divisors (see below), whose sum is σ = 114535680. Its totient is φ = 10632960.

The previous prime is 40389529. The next prime is 40389563. The reversal of 40389540 is 4598304.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 480 + ... + 9000.

It is an arithmetic number, because the mean of its divisors is an integer number (2386160).

Almost surely, 2^40389540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40389540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57267840).

40389540 is an abundant number, since it is smaller than the sum of its proper divisors (74146140).

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

40389540 is a wasteful number, since it uses less digits than its factorization.

40389540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8612 (or 8610 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 40389540 is about 6355.2765478774. The cubic root of 40389540 is about 343.1017782832.

The spelling of 40389540 in words is "forty million, three hundred eighty-nine thousand, five hundred forty".