40253240 has 16 divisors (see below), whose sum is σ = 90569880. Its totient is φ = 16101280.

The previous prime is 40253233. The next prime is 40253261. The reversal of 40253240 is 4235204.

40253240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 503126 + ... + 503205.

Almost surely, 2^40253240 is an apocalyptic number.

40253240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40253240 is an abundant number, since it is smaller than the sum of its proper divisors (50316640).

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

40253240 is a wasteful number, since it uses less digits than its factorization.

40253240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006342 (or 1006338 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40253240 is about 6344.5441128579. The cubic root of 40253240 is about 342.7153954398.

Adding to 40253240 its reverse (4235204), we get a palindrome (44488444).

The spelling of 40253240 in words is "forty million, two hundred fifty-three thousand, two hundred forty".