488566640 has 20 divisors (see below), whose sum is σ = 1135917624. Its totient is φ = 195426624.

The previous prime is 488566633. The next prime is 488566643. The reversal of 488566640 is 46665884.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (488566643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053462 + ... + 3053621.

Almost surely, 2^488566640 is an apocalyptic number.

488566640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

488566640 is an abundant number, since it is smaller than the sum of its proper divisors (647350984).

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

488566640 is a wasteful number, since it uses less digits than its factorization.

488566640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107096 (or 6107090 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The square root of 488566640 is about 22103.5436073042. The cubic root of 488566640 is about 787.6040423551.

The spelling of 488566640 in words is "four hundred eighty-eight million, five hundred sixty-six thousand, six hundred forty".