647497152 has 280 divisors, whose sum is σ = 2046884400. Its totient is φ = 202051584.

The previous prime is 647497141. The next prime is 647497157. The reversal of 647497152 is 251794746.

647497152 is a `hidden beast` number, since 6 + 4 + 7 + 497 + 152 = 666.

It is a super-2 number, since 2×647497152² = 838505123696222208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 647497098 and 647497107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647497157) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8869788 + ... + 8869860.

Almost surely, 2^647497152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647497152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023442200).

647497152 is an abundant number, since it is smaller than the sum of its proper divisors (1399387248).

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

647497152 is a wasteful number, since it uses less digits than its factorization.

647497152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 166 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 647497152 is about 25445.9653383400. The cubic root of 647497152 is about 865.1258471270.

The spelling of 647497152 in words is "six hundred forty-seven million, four hundred ninety-seven thousand, one hundred fifty-two".