869878454 has 4 divisors (see below), whose sum is σ = 1304817684. Its totient is φ = 434939226.

The previous prime is 869878441. The next prime is 869878459. The reversal of 869878454 is 454878968.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 869878393 and 869878402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869878459) 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 as a sum of consecutive naturals, namely, 217469612 + ... + 217469615.

It is an arithmetic number, because the mean of its divisors is an integer number (326204421).

Almost surely, 2^869878454 is an apocalyptic number.

869878454 is a deficient number, since it is larger than the sum of its proper divisors (434939230).

869878454 is a wasteful number, since it uses less digits than its factorization.

869878454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434939229.

The product of its digits is 15482880, while the sum is 59.

The square root of 869878454 is about 29493.7019378714. The cubic root of 869878454 is about 954.5958118899.

The spelling of 869878454 in words is "eight hundred sixty-nine million, eight hundred seventy-eight thousand, four hundred fifty-four".