8439457 has 8 divisors (see below), whose sum is σ = 9214184. Its totient is φ = 7682688.

The previous prime is 8439449. The next prime is 8439467. The reversal of 8439457 is 7549348.

It can be written as a sum of positive squares in 4 ways, for example, as 6241 + 8433216 = 79^2 + 2904^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8439457 - 2³ = 8439449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8439437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3498 + ... + 5395.

It is an arithmetic number, because the mean of its divisors is an integer number (1151773).

Almost surely, 2^8439457 is an apocalyptic number.

It is an amenable number.

8439457 is a deficient number, since it is larger than the sum of its proper divisors (774727).

8439457 is a wasteful number, since it uses less digits than its factorization.

8439457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8979.

The product of its digits is 120960, while the sum is 40.

The square root of 8439457 is about 2905.0743536096. The cubic root of 8439457 is about 203.5970596287.

The spelling of 8439457 in words is "eight million, four hundred thirty-nine thousand, four hundred fifty-seven".