647951460 has 192 divisors, whose sum is σ = 2042363904. Its totient is φ = 152409600.

The previous prime is 647951459. The next prime is 647951503. The reversal of 647951460 is 64159746.

It is a super-2 number, since 2×647951460² = 839682189032263200, which contains 22 as substring.

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, 3070755 + ... + 3070965.

It is an arithmetic number, because the mean of its divisors is an integer number (10637312).

Almost surely, 2^647951460 is an apocalyptic number.

647951460 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 647951460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021181952).

647951460 is an abundant number, since it is smaller than the sum of its proper divisors (1394412444).

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

647951460 is a wasteful number, since it uses less digits than its factorization.

647951460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 647951460 is about 25454.8906892173. The cubic root of 647951460 is about 865.3281346097.

The spelling of 647951460 in words is "six hundred forty-seven million, nine hundred fifty-one thousand, four hundred sixty".