489978806 has 4 divisors (see below), whose sum is σ = 734968212. Its totient is φ = 244989402.

The previous prime is 489978803. The next prime is 489978877. The reversal of 489978806 is 608879984.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489978803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122494700 + ... + 122494703.

It is an arithmetic number, because the mean of its divisors is an integer number (183742053).

Almost surely, 2^489978806 is an apocalyptic number.

489978806 is a deficient number, since it is larger than the sum of its proper divisors (244989406).

489978806 is a wasteful number, since it uses less digits than its factorization.

489978806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244989405.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The square root of 489978806 is about 22135.4648923396. The cubic root of 489978806 is about 788.3621496240.

The spelling of 489978806 in words is "four hundred eighty-nine million, nine hundred seventy-eight thousand, eight hundred six".