894721878 has 24 divisors (see below), whose sum is σ = 1953367416. Its totient is φ = 295963200.

The previous prime is 894721871. The next prime is 894721897. The reversal of 894721878 is 878127498.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (894721871) 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 11 ways as a sum of consecutive naturals, for example, 187363 + ... + 192078.

It is an arithmetic number, because the mean of its divisors is an integer number (81390309).

Almost surely, 2^894721878 is an apocalyptic number.

894721878 is an abundant number, since it is smaller than the sum of its proper divisors (1058645538).

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

894721878 is a wasteful number, since it uses less digits than its factorization.

894721878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379580 (or 379577 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 894721878 is about 29911.9019455467. The cubic root of 894721878 is about 963.5982863629.

The spelling of 894721878 in words is "eight hundred ninety-four million, seven hundred twenty-one thousand, eight hundred seventy-eight".