8490778 has 8 divisors (see below), whose sum is σ = 12879540. Its totient is φ = 4197600.

The previous prime is 8490763. The next prime is 8490787. The reversal of 8490778 is 8770948.

It can be written as a sum of positive squares in 2 ways, for example, as 8162449 + 328329 = 2857^2 + 573^2 .

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

It is a super-2 number, since 2×8490778² = 144186622090568, which contains 22 as substring.

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, 23673 + ... + 24028.

Almost surely, 2^8490778 is an apocalyptic number.

8490778 is a deficient number, since it is larger than the sum of its proper divisors (4388762).

8490778 is a wasteful number, since it uses less digits than its factorization.

8490778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47792.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 8490778 is about 2913.8939582627. The cubic root of 8490778 is about 204.0089224599.

The spelling of 8490778 in words is "eight million, four hundred ninety thousand, seven hundred seventy-eight".