8879389 has 4 divisors (see below), whose sum is σ = 9401724. Its totient is φ = 8357056.

The previous prime is 8879369. The next prime is 8879393. The reversal of 8879389 is 9839788.

8879389 = 392² + 393² + ... + 442².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 4644025 = 2058^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 8879389 - 2⁷ = 8879261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8879359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261142 + ... + 261175.

It is an arithmetic number, because the mean of its divisors is an integer number (2350431).

Almost surely, 2^8879389 is an apocalyptic number.

It is an amenable number.

8879389 is a deficient number, since it is larger than the sum of its proper divisors (522335).

8879389 is a wasteful number, since it uses less digits than its factorization.

8879389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522334.

The product of its digits is 870912, while the sum is 52.

The square root of 8879389 is about 2979.8303642993. The cubic root of 8879389 is about 207.0750115163.

The spelling of 8879389 in words is "eight million, eight hundred seventy-nine thousand, three hundred eighty-nine".