878420234 has 4 divisors (see below), whose sum is σ = 1317630354. Its totient is φ = 439210116.

The previous prime is 878420201. The next prime is 878420267. The reversal of 878420234 is 432024878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432024878 = 2 ⋅216012439.

It is an interprime number because it is at equal distance from previous prime (878420201) and next prime (878420267).

It can be written as a sum of positive squares in only one way, i.e., 587820025 + 290600209 = 24245^2 + 17047^2 .

It is a super-2 number, since 2×878420234² = 1543244215001229512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219605057 + ... + 219605060.

Almost surely, 2^878420234 is an apocalyptic number.

878420234 is a deficient number, since it is larger than the sum of its proper divisors (439210120).

878420234 is a wasteful number, since it uses less digits than its factorization.

878420234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439210119.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 878420234 is about 29638.1550370464. The cubic root of 878420234 is about 957.7101944309.

The spelling of 878420234 in words is "eight hundred seventy-eight million, four hundred twenty thousand, two hundred thirty-four".