489019978 has 16 divisors (see below), whose sum is σ = 758695680. Its totient is φ = 236152800.

The previous prime is 489019969. The next prime is 489020003. The reversal of 489019978 is 879910984.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24733 + ... + 39871.

It is an arithmetic number, because the mean of its divisors is an integer number (47418480).

Almost surely, 2^489019978 is an apocalyptic number.

489019978 is a deficient number, since it is larger than the sum of its proper divisors (269675702).

489019978 is a wasteful number, since it uses less digits than its factorization.

489019978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15693.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 489019978 is about 22113.7961010768. The cubic root of 489019978 is about 787.8475713737.

The spelling of 489019978 in words is "four hundred eighty-nine million, nineteen thousand, nine hundred seventy-eight".