40452140 has 24 divisors (see below), whose sum is σ = 89421360. Its totient is φ = 15329088.

The previous prime is 40452131. The next prime is 40452143. The reversal of 40452140 is 4125404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (40452143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52847 + ... + 53606.

It is an arithmetic number, because the mean of its divisors is an integer number (3725890).

Almost surely, 2^40452140 is an apocalyptic number.

It is an amenable number.

40452140 is an abundant number, since it is smaller than the sum of its proper divisors (48969220).

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

40452140 is a wasteful number, since it uses less digits than its factorization.

40452140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106481 (or 106479 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40452140 is about 6360.1996823999. The cubic root of 40452140 is about 343.2789453128.

Adding to 40452140 its reverse (4125404), we get a palindrome (44577544).

The spelling of 40452140 in words is "forty million, four hundred fifty-two thousand, one hundred forty".