878758398 has 96 divisors (see below), whose sum is σ = 2298067200. Its totient is φ = 237074688.

The previous prime is 878758393. The next prime is 878758403. The reversal of 878758398 is 893857878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (878758393) and next prime (878758403).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878758393) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1419333 + ... + 1419951.

It is an arithmetic number, because the mean of its divisors is an integer number (23938200).

Almost surely, 2^878758398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878758398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149033600).

878758398 is an abundant number, since it is smaller than the sum of its proper divisors (1419308802).

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

878758398 is a wasteful number, since it uses less digits than its factorization.

878758398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1243 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The square root of 878758398 is about 29643.8593641246. The cubic root of 878758398 is about 957.8330747060.

The spelling of 878758398 in words is "eight hundred seventy-eight million, seven hundred fifty-eight thousand, three hundred ninety-eight".