878056418 has 18 divisors (see below), whose sum is σ = 1378351947. Its totient is φ = 419479060.

The previous prime is 878056411. The next prime is 878056423. The reversal of 878056418 is 814650878.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 439028209 + 439028209 = 20953^2 + 20953^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20953.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (878056411) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 963383 + ... + 964293.

Almost surely, 2^878056418 is an apocalyptic number.

878056418 is a deficient number, since it is larger than the sum of its proper divisors (500295529).

878056418 is an frugal number, since it uses more digits than its factorization.

878056418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 878056418 is about 29632.0167724035. The cubic root of 878056418 is about 957.5779576445.

The spelling of 878056418 in words is "eight hundred seventy-eight million, fifty-six thousand, four hundred eighteen".