879642 has 12 divisors (see below), whose sum is σ = 1905930. Its totient is φ = 293208.

The previous prime is 879629. The next prime is 879649. The reversal of 879642 is 246978.

879642 is a `hidden beast` number, since 8 + 7 + 9 + 642 = 666.

879642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 826281 + 53361 = 909^2 + 231^2 .

It is a junction number, because it is equal to n+sod(n) for n = 879597 and 879606.

It is not an unprimeable number, because it can be changed into a prime (879649) by changing a digit.

879642 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 5 ways as a sum of consecutive naturals, for example, 24417 + ... + 24452.

2⁸⁷⁹⁶⁴² is an apocalyptic number.

879642 is an abundant number, since it is smaller than the sum of its proper divisors (1026288).

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

879642 is a wasteful number, since it uses less digits than its factorization.

879642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48877 (or 48874 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 879642 is about 937.8923179129. The cubic root of 879642 is about 95.8154004672.

It can be divided in two parts, 879 and 642, that added together give a square (1521 = 39²).

The spelling of 879642 in words is "eight hundred seventy-nine thousand, six hundred forty-two".