878384242 has 4 divisors (see below), whose sum is σ = 1317576366. Its totient is φ = 439192120.

The previous prime is 878384207. The next prime is 878384257. The reversal of 878384242 is 242483878.

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

It can be written as a sum of positive squares in only one way, i.e., 835730281 + 42653961 = 28909^2 + 6531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 878384192 and 878384201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219596059 + ... + 219596062.

Almost surely, 2^878384242 is an apocalyptic number.

878384242 is a deficient number, since it is larger than the sum of its proper divisors (439192124).

878384242 is a wasteful number, since it uses less digits than its factorization.

878384242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439192123.

The product of its digits is 688128, while the sum is 46.

The square root of 878384242 is about 29637.5478405350. The cubic root of 878384242 is about 957.6971139883.

It can be divided in two parts, 8783 and 84242, that added together give a square (93025 = 305²).

The spelling of 878384242 in words is "eight hundred seventy-eight million, three hundred eighty-four thousand, two hundred forty-two".