40252140 has 60 divisors (see below), whose sum is σ = 126277536. Its totient is φ = 10733472.

The previous prime is 40252133. The next prime is 40252153. The reversal of 40252140 is 4125204.

40252140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10804 + ... + 14043.

Almost surely, 2^40252140 is an apocalyptic number.

It is an amenable number.

40252140 is an abundant number, since it is smaller than the sum of its proper divisors (86025396).

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

40252140 is a wasteful number, since it uses less digits than its factorization.

40252140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24868 (or 24857 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40252140 is about 6344.4574236100. The cubic root of 40252140 is about 342.7122736177.

Adding to 40252140 its reverse (4125204), we get a palindrome (44377344).

The spelling of 40252140 in words is "forty million, two hundred fifty-two thousand, one hundred forty".