487657640 has 16 divisors (see below), whose sum is σ = 1097229780. Its totient is φ = 195063040.

The previous prime is 487657637. The next prime is 487657657. The reversal of 487657640 is 46756784.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 409900516 + 77757124 = 20246^2 + 8818^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6095681 + ... + 6095760.

Almost surely, 2^487657640 is an apocalyptic number.

487657640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

487657640 is an abundant number, since it is smaller than the sum of its proper divisors (609572140).

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

487657640 is a wasteful number, since it uses less digits than its factorization.

487657640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191452 (or 12191448 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The square root of 487657640 is about 22082.9717203097. The cubic root of 487657640 is about 787.1152816394.

The spelling of 487657640 in words is "four hundred eighty-seven million, six hundred fifty-seven thousand, six hundred forty".