879978 has 32 divisors (see below), whose sum is σ = 1958400. Its totient is φ = 261360.

The previous prime is 879973. The next prime is 879979.

879978 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×879978² = 1548722560968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (879973) by changing a digit.

879978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4323 + ... + 4521.

It is an arithmetic number, because the mean of its divisors is an integer number (61200).

2⁸⁷⁹⁹⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 879978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (979200).

879978 is an abundant number, since it is smaller than the sum of its proper divisors (1078422).

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

879978 is a wasteful number, since it uses less digits than its factorization.

879978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282.

The product of its digits is 254016, while the sum is 48.

The square root of 879978 is about 938.0714258520. The cubic root of 879978 is about 95.8275985646.

The spelling of 879978 in words is "eight hundred seventy-nine thousand, nine hundred seventy-eight".