8440437 has 4 divisors (see below), whose sum is σ = 11253920. Its totient is φ = 5626956.

The previous prime is 8440429. The next prime is 8440441. The reversal of 8440437 is 7340448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8440437 - 2³ = 8440429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406737 + ... + 1406742.

It is an arithmetic number, because the mean of its divisors is an integer number (2813480).

Almost surely, 2^8440437 is an apocalyptic number.

It is an amenable number.

8440437 is a deficient number, since it is larger than the sum of its proper divisors (2813483).

8440437 is a wasteful number, since it uses less digits than its factorization.

8440437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813482.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 8440437 is about 2905.2430190950. The cubic root of 8440437 is about 203.6049399697.

The spelling of 8440437 in words is "eight million, four hundred forty thousand, four hundred thirty-seven".