7869645 has 72 divisors (see below), whose sum is σ = 16432416. Its totient is φ = 3471552.

The previous prime is 7869637. The next prime is 7869661. The reversal of 7869645 is 5469687.

It is not a de Polignac number, because 7869645 - 2³ = 7869637 is a prime.

It is a super-3 number, since 3×7869645³ (a number of 22 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 7869645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 94774 + ... + 94856.

It is an arithmetic number, because the mean of its divisors is an integer number (228228).

Almost surely, 2^7869645 is an apocalyptic number.

It is an amenable number.

7869645 is an abundant number, since it is smaller than the sum of its proper divisors (8562771).

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

7869645 is a wasteful number, since it uses less digits than its factorization.

7869645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 141 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 7869645 is about 2805.2887551908. The cubic root of 7869645 is about 198.9077541875.

The spelling of 7869645 in words is "seven million, eight hundred sixty-nine thousand, six hundred forty-five".