8457290 has 8 divisors (see below), whose sum is σ = 15223140. Its totient is φ = 3382912.

The previous prime is 8457287. The next prime is 8457329. The reversal of 8457290 is 927548.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7722841 + 734449 = 2779^2 + 857^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 8457290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422855 + ... + 422874.

Almost surely, 2^8457290 is an apocalyptic number.

8457290 is a deficient number, since it is larger than the sum of its proper divisors (6765850).

8457290 is a wasteful number, since it uses less digits than its factorization.

8457290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845736.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 8457290 is about 2908.1420185404. The cubic root of 8457290 is about 203.7403623730.

The spelling of 8457290 in words is "eight million, four hundred fifty-seven thousand, two hundred ninety".