40240452 has 48 divisors (see below), whose sum is σ = 108372992. Its totient is φ = 11383200.

The previous prime is 40240451. The next prime is 40240471. The reversal of 40240452 is 25404204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (40240451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6327 + ... + 10977.

Almost surely, 2^40240452 is an apocalyptic number.

40240452 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40240452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54186496).

40240452 is an abundant number, since it is smaller than the sum of its proper divisors (68132540).

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

40240452 is a wasteful number, since it uses less digits than its factorization.

40240452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40240452 is about 6343.5362377778. The cubic root of 40240452 is about 342.6790993250.

Adding to 40240452 its reverse (25404204), we get a palindrome (65644656).

The spelling of 40240452 in words is "forty million, two hundred forty thousand, four hundred fifty-two".