487736640 has 280 divisors, whose sum is σ = 1793882112. Its totient is φ = 125660160.

The previous prime is 487736629. The next prime is 487736677. The reversal of 487736640 is 46637784.

487736640 is a `hidden beast` number, since 487 + 73 + 66 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 803217 + ... + 803823.

Almost surely, 2^487736640 is an apocalyptic number.

487736640 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 487736640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (896941056).

487736640 is an abundant number, since it is smaller than the sum of its proper divisors (1306145472).

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

487736640 is a wasteful number, since it uses less digits than its factorization.

487736640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The square root of 487736640 is about 22084.7603564087. The cubic root of 487736640 is about 787.1577832803.

The spelling of 487736640 in words is "four hundred eighty-seven million, seven hundred thirty-six thousand, six hundred forty".