647498880 has 512 divisors, whose sum is σ = 2696716800. Its totient is φ = 143769600.

The previous prime is 647498869. The next prime is 647498893. The reversal of 647498880 is 88894746.

647498880 is a `hidden beast` number, since 6 + 474 + 98 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6410830 + ... + 6410930.

It is an arithmetic number, because the mean of its divisors is an integer number (5267025).

Almost surely, 2^647498880 is an apocalyptic number.

647498880 is a gapful number since it is divisible by the number (60) 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 647498880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348358400).

647498880 is an abundant number, since it is smaller than the sum of its proper divisors (2049217920).

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

647498880 is a wasteful number, since it uses less digits than its factorization.

647498880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 647498880 is about 25445.9992926197. Note that the first 3 decimals coincide. The cubic root of 647498880 is about 865.1266167242.

The spelling of 647498880 in words is "six hundred forty-seven million, four hundred ninety-eight thousand, eight hundred eighty".