8421170490 has 48 divisors (see below), whose sum is σ = 23182991208. Its totient is φ = 2113548288.

The previous prime is 8421170489. The next prime is 8421170501. The reversal of 8421170490 is 940711248.

8421170490 is a `hidden beast` number, since 84 + 21 + 1 + 70 + 490 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7527818169 + 893352321 = 86763^2 + 29889^2 .

It is a super-2 number, since 2×8421170490² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2750487 + ... + 2753546.

Almost surely, 2^8421170490 is an apocalyptic number.

8421170490 is an abundant number, since it is smaller than the sum of its proper divisors (14761820718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421170490 is a wasteful number, since it uses less digits than its factorization.

8421170490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5504063 (or 5504060 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8421170490 is about 91766.9357121616. The cubic root of 8421170490 is about 2034.4990276978.

The spelling of 8421170490 in words is "eight billion, four hundred twenty-one million, one hundred seventy thousand, four hundred ninety".