8453440 has 28 divisors (see below), whose sum is σ = 20130516. Its totient is φ = 3381248.

The previous prime is 8453411. The next prime is 8453477. The reversal of 8453440 is 443548.

It can be written as a sum of positive squares in 2 ways, for example, as 2143296 + 6310144 = 1464^2 + 2512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8453399 and 8453408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12889 + ... + 13528.

It is an arithmetic number, because the mean of its divisors is an integer number (718947).

Almost surely, 2^8453440 is an apocalyptic number.

8453440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8453440 is an abundant number, since it is smaller than the sum of its proper divisors (11677076).

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

8453440 is a wasteful number, since it uses less digits than its factorization.

8453440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26434 (or 26424 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 8453440 is about 2907.4800085297. The cubic root of 8453440 is about 203.7094415362.

Adding to 8453440 its reverse (443548), we get a palindrome (8896988).

The spelling of 8453440 in words is "eight million, four hundred fifty-three thousand, four hundred forty".