489591400 has 48 divisors (see below), whose sum is σ = 1169082540. Its totient is φ = 190540800.

The previous prime is 489591397. The next prime is 489591407. The reversal of 489591400 is 4195984.

It can be written as a sum of positive squares in 6 ways, for example, as 413796964 + 75794436 = 20342^2 + 8706^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (489591407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25681 + ... + 40480.

Almost surely, 2^489591400 is an apocalyptic number.

489591400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489591400 is an abundant number, since it is smaller than the sum of its proper divisors (679491140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489591400 is a wasteful number, since it uses less digits than its factorization.

489591400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66214 (or 66205 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 489591400 is about 22126.7123631144. The cubic root of 489591400 is about 788.1543197125.

The spelling of 489591400 in words is "four hundred eighty-nine million, five hundred ninety-one thousand, four hundred".