9878255 has 4 divisors (see below), whose sum is σ = 11853912. Its totient is φ = 7902600.

The previous prime is 9878251. The next prime is 9878257. The reversal of 9878255 is 5528789.

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

It is not a de Polignac number, because 9878255 - 2² = 9878251 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 (9878251) 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, 987821 + ... + 987830.

It is an arithmetic number, because the mean of its divisors is an integer number (2963478).

Almost surely, 2^9878255 is an apocalyptic number.

9878255 is a deficient number, since it is larger than the sum of its proper divisors (1975657).

9878255 is a wasteful number, since it uses less digits than its factorization.

9878255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975656.

The product of its digits is 201600, while the sum is 44.

The square root of 9878255 is about 3142.9691376149. The cubic root of 9878255 is about 214.5655912269.

It can be divided in two parts, 9878 and 255, that multiplied together give a triangular number (2518890 = T₂₂₄₄).

The spelling of 9878255 in words is "nine million, eight hundred seventy-eight thousand, two hundred fifty-five".