878278401 has 144 divisors (see below), whose sum is σ = 1827483840. Its totient is φ = 398442240.

The previous prime is 878278399. The next prime is 878278417. The reversal of 878278401 is 104872878.

It is not a de Polignac number, because 878278401 - 2¹ = 878278399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878278421) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1197831 + ... + 1198563.

It is an arithmetic number, because the mean of its divisors is an integer number (12690860).

Almost surely, 2^878278401 is an apocalyptic number.

It is an amenable number.

878278401 is an abundant number, since it is smaller than the sum of its proper divisors (949205439).

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

878278401 is a wasteful number, since it uses less digits than its factorization.

878278401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 878278401 is about 29635.7621970483. The cubic root of 878278401 is about 957.6586465057.

The spelling of 878278401 in words is "eight hundred seventy-eight million, two hundred seventy-eight thousand, four hundred one".