489253978 has 4 divisors (see below), whose sum is σ = 733880970. Its totient is φ = 244626988.

The previous prime is 489253967. The next prime is 489253979. The reversal of 489253978 is 879352984.

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., 461089729 + 28164249 = 21473^2 + 5307^2 .

It is not an unprimeable number, because it can be changed into a prime (489253979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122313493 + ... + 122313496.

Almost surely, 2^489253978 is an apocalyptic number.

489253978 is a deficient number, since it is larger than the sum of its proper divisors (244626992).

489253978 is a wasteful number, since it uses less digits than its factorization.

489253978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244626991.

The product of its digits is 4354560, while the sum is 55.

The square root of 489253978 is about 22119.0862831176. The cubic root of 489253978 is about 787.9732151391.

The spelling of 489253978 in words is "four hundred eighty-nine million, two hundred fifty-three thousand, nine hundred seventy-eight".