488490640 has 80 divisors (see below), whose sum is σ = 1243045440. Its totient is φ = 177052160.

The previous prime is 488490637. The next prime is 488490661. The reversal of 488490640 is 46094884.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341607 + ... + 343033.

It is an arithmetic number, because the mean of its divisors is an integer number (15538068).

Almost surely, 2^488490640 is an apocalyptic number.

488490640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 488490640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621522720).

488490640 is an abundant number, since it is smaller than the sum of its proper divisors (754554800).

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

488490640 is a wasteful number, since it uses less digits than its factorization.

488490640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1834 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 488490640 is about 22101.8243590886. The cubic root of 488490640 is about 787.5632011089.

The spelling of 488490640 in words is "four hundred eighty-eight million, four hundred ninety thousand, six hundred forty".