878227644 has 48 divisors (see below), whose sum is σ = 2417494016. Its totient is φ = 242827200.

The previous prime is 878227643. The next prime is 878227673. The reversal of 878227644 is 446722878.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 878227593 and 878227602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878227643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166027 + ... + 171234.

Almost surely, 2^878227644 is an apocalyptic number.

878227644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

878227644 is an abundant number, since it is smaller than the sum of its proper divisors (1539266372).

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

878227644 is a wasteful number, since it uses less digits than its factorization.

878227644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337306 (or 337304 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 48.

The square root of 878227644 is about 29634.9058375423. The cubic root of 878227644 is about 957.6401979833.

The spelling of 878227644 in words is "eight hundred seventy-eight million, two hundred twenty-seven thousand, six hundred forty-four".