489705778 has 4 divisors (see below), whose sum is σ = 734558670. Its totient is φ = 244852888.

The previous prime is 489705773. The next prime is 489705781. The reversal of 489705778 is 877507984.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 279658729 + 210047049 = 16723^2 + 14493^2 .

It is not an unprimeable number, because it can be changed into a prime (489705773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122426443 + ... + 122426446.

Almost surely, 2^489705778 is an apocalyptic number.

489705778 is a deficient number, since it is larger than the sum of its proper divisors (244852892).

489705778 is a wasteful number, since it uses less digits than its factorization.

489705778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244852891.

The product of its (nonzero) digits is 3951360, while the sum is 55.

The square root of 489705778 is about 22129.2968257014. The cubic root of 489705778 is about 788.2156909536.

The spelling of 489705778 in words is "four hundred eighty-nine million, seven hundred five thousand, seven hundred seventy-eight".