40453440 has 56 divisors (see below), whose sum is σ = 128442720. Its totient is φ = 10787328.

The previous prime is 40453433. The next prime is 40453471. The reversal of 40453440 is 4435404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40453440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20110 + ... + 22029.

It is an arithmetic number, because the mean of its divisors is an integer number (2293620).

Almost surely, 2^40453440 is an apocalyptic number.

40453440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40453440 is an abundant number, since it is smaller than the sum of its proper divisors (87989280).

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

40453440 is a wasteful number, since it uses less digits than its factorization.

40453440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42159 (or 42149 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 40453440 is about 6360.3018796280. The cubic root of 40453440 is about 343.2826225624.

Subtracting from 40453440 its product of nonzero digits (3840), we obtain a square (40449600 = 6360²).

Adding to 40453440 its reverse (4435404), we get a palindrome (44888844).

The spelling of 40453440 in words is "forty million, four hundred fifty-three thousand, four hundred forty".