8420769 has 24 divisors (see below), whose sum is σ = 14099072. Its totient is φ = 4743360.

The previous prime is 8420749. The next prime is 8420771. The reversal of 8420769 is 9670248.

It is not a de Polignac number, because 8420769 - 2¹² = 8416673 is a prime.

It is a super-3 number, since 3×8420769³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8420749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3684 + ... + 5514.

Almost surely, 2^8420769 is an apocalyptic number.

It is an amenable number.

8420769 is a deficient number, since it is larger than the sum of its proper divisors (5678303).

8420769 is a wasteful number, since it uses less digits than its factorization.

8420769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 8420769 is about 2901.8561301346. The cubic root of 8420769 is about 203.4466694742.

The spelling of 8420769 in words is "eight million, four hundred twenty thousand, seven hundred sixty-nine".