8870409 has 6 divisors (see below), whose sum is σ = 12812826. Its totient is φ = 5913600.

The previous prime is 8870401. The next prime is 8870423. The reversal of 8870409 is 9040788.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 138384 = 2955^2 + 372^2 .

It is not a de Polignac number, because 8870409 - 2³ = 8870401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8870401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 492792 + ... + 492809.

It is an arithmetic number, because the mean of its divisors is an integer number (2135471).

Almost surely, 2^8870409 is an apocalyptic number.

It is an amenable number.

8870409 is a deficient number, since it is larger than the sum of its proper divisors (3942417).

8870409 is a wasteful number, since it uses less digits than its factorization.

8870409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985607 (or 985604 counting only the distinct ones).

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

The square root of 8870409 is about 2978.3231859555. The cubic root of 8870409 is about 207.0051808547.

The spelling of 8870409 in words is "eight million, eight hundred seventy thousand, four hundred nine".