878531090 has 8 divisors (see below), whose sum is σ = 1581355980. Its totient is φ = 351412432.

The previous prime is 878531081. The next prime is 878531099. The reversal of 878531090 is 90135878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (878531081) and next prime (878531099).

It can be written as a sum of positive squares in 2 ways, for example, as 857728369 + 20802721 = 29287^2 + 4561^2 .

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

It is not an unprimeable number, because it can be changed into a prime (878531099) 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, 43926545 + ... + 43926564.

Almost surely, 2^878531090 is an apocalyptic number.

878531090 is a deficient number, since it is larger than the sum of its proper divisors (702824890).

878531090 is a wasteful number, since it uses less digits than its factorization.

878531090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87853116.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 878531090 is about 29640.0251349421. The cubic root of 878531090 is about 957.7504801815.

The spelling of 878531090 in words is "eight hundred seventy-eight million, five hundred thirty-one thousand, ninety".