801157878 has 56 divisors (see below), whose sum is σ = 1907827128. Its totient is φ = 251335872.

The previous prime is 801157871. The next prime is 801157901. The reversal of 801157878 is 878751108.

801157878 is a `hidden beast` number, since 8 + 0 + 1 + 1 + 578 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801157871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8625 + ... + 40947.

Almost surely, 2^801157878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 801157878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953913564).

801157878 is an abundant number, since it is smaller than the sum of its proper divisors (1106669250).

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

801157878 is a wasteful number, since it uses less digits than its factorization.

801157878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32360 (or 32345 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 45.

The square root of 801157878 is about 28304.7324311678. The cubic root of 801157878 is about 928.7654169564.

The spelling of 801157878 in words is "eight hundred one million, one hundred fifty-seven thousand, eight hundred seventy-eight".