40523140 has 48 divisors (see below), whose sum is σ = 99896832. Its totient is φ = 13516416.

The previous prime is 40523137. The next prime is 40523159. The reversal of 40523140 is 4132504.

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, 1269 + ... + 9091.

It is an arithmetic number, because the mean of its divisors is an integer number (2081184).

Almost surely, 2^40523140 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 40523140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49948416).

40523140 is an abundant number, since it is smaller than the sum of its proper divisors (59373692).

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

40523140 is a wasteful number, since it uses less digits than its factorization.

40523140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876 (or 7874 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40523140 is about 6365.7788211656. The cubic root of 40523140 is about 343.4796644804.

Adding to 40523140 its reverse (4132504), we get a palindrome (44655644).

The spelling of 40523140 in words is "forty million, five hundred twenty-three thousand, one hundred forty".