878220438 has 8 divisors (see below), whose sum is σ = 1756440888. Its totient is φ = 292740144.

The previous prime is 878220437. The next prime is 878220503. The reversal of 878220438 is 834022878.

It is a sphenic number, since it is the product of 3 distinct primes.

878220438 is an admirable number.

It is a super-2 number, since 2×878220438² = 1542542275441823688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 878220438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878220437) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 73185031 + ... + 73185042.

It is an arithmetic number, because the mean of its divisors is an integer number (219555111).

Almost surely, 2^878220438 is an apocalyptic number.

878220438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

878220438 is a wasteful number, since it uses less digits than its factorization.

878220438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146370078.

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 878220438 is about 29634.7842576929. The cubic root of 878220438 is about 957.6375787785.

The spelling of 878220438 in words is "eight hundred seventy-eight million, two hundred twenty thousand, four hundred thirty-eight".