647235020 has 24 divisors (see below), whose sum is σ = 1392346368. Its totient is φ = 252579200.

The previous prime is 647234947. The next prime is 647235041. The reversal of 647235020 is 20532746.

It is a super-2 number, since 2×647235020² = 837826342228800800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393836 + ... + 395475.

It is an arithmetic number, because the mean of its divisors is an integer number (58014432).

Almost surely, 2^647235020 is an apocalyptic number.

It is an amenable number.

647235020 is an abundant number, since it is smaller than the sum of its proper divisors (745111348).

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

647235020 is a wasteful number, since it uses less digits than its factorization.

647235020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789361 (or 789359 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 647235020 is about 25440.8140593024. The cubic root of 647235020 is about 865.0090858524.

Adding to 647235020 its reverse (20532746), we get a palindrome (667767766).

The spelling of 647235020 in words is "six hundred forty-seven million, two hundred thirty-five thousand, twenty".