8278965 has 48 divisors (see below), whose sum is σ = 15799680. Its totient is φ = 3991680.

The previous prime is 8278961. The next prime is 8278969. The reversal of 8278965 is 5698728.

It is an interprime number because it is at equal distance from previous prime (8278961) and next prime (8278969).

It is not a de Polignac number, because 8278965 - 2² = 8278961 is a prime.

It is a super-2 number, since 2×8278965² = 137082522942450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

8278965 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8278965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8278961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19455 + ... + 19875.

It is an arithmetic number, because the mean of its divisors is an integer number (329160).

Almost surely, 2^8278965 is an apocalyptic number.

It is an amenable number.

8278965 is a deficient number, since it is larger than the sum of its proper divisors (7520715).

8278965 is a wasteful number, since it uses less digits than its factorization.

8278965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 471 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 8278965 is about 2877.3190646850. The cubic root of 8278965 is about 202.2981985958.

The spelling of 8278965 in words is "eight million, two hundred seventy-eight thousand, nine hundred sixty-five".