8457490 has 8 divisors (see below), whose sum is σ = 15223500. Its totient is φ = 3382992.

The previous prime is 8457487. The next prime is 8457499. The reversal of 8457490 is 947548.

It can be written as a sum of positive squares in 2 ways, for example, as 7890481 + 567009 = 2809^2 + 753^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8457499) by changing a digit.

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, 422865 + ... + 422884.

Almost surely, 2^8457490 is an apocalyptic number.

8457490 is a deficient number, since it is larger than the sum of its proper divisors (6766010).

8457490 is a wasteful number, since it uses less digits than its factorization.

8457490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845756.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 8457490 is about 2908.1764045532. The cubic root of 8457490 is about 203.7419683938.

The spelling of 8457490 in words is "eight million, four hundred fifty-seven thousand, four hundred ninety".