879138 has 54 divisors (see below), whose sum is σ = 2191059. Its totient is φ = 254592.

The previous prime is 879133. The next prime is 879143. The reversal of 879138 is 831978.

It is an interprime number because it is at equal distance from previous prime (879133) and next prime (879143).

It can be written as a sum of positive squares in 5 ways, for example, as 356409 + 522729 = 597^2 + 723^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=663.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 879138.

It is not an unprimeable number, because it can be changed into a prime (879133) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 51706 + ... + 51722.

2⁸⁷⁹¹³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 879138

879138 is an abundant number, since it is smaller than the sum of its proper divisors (1311921).

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

879138 is a wasteful number, since it uses less digits than its factorization.

879138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 35 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 879138 is about 937.6235918534. The cubic root of 879138 is about 95.7970974956.

The spelling of 879138 in words is "eight hundred seventy-nine thousand, one hundred thirty-eight".