647601020 has 24 divisors (see below), whose sum is σ = 1483595568. Its totient is φ = 235491200.

The previous prime is 647600983. The next prime is 647601023. The reversal of 647601020 is 20106746.

It is a super-2 number, since 2×647601020² = 838774162210080800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647601023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471601 + ... + 1472040.

It is an arithmetic number, because the mean of its divisors is an integer number (61816482).

Almost surely, 2^647601020 is an apocalyptic number.

It is an amenable number.

647601020 is an abundant number, since it is smaller than the sum of its proper divisors (835994548).

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

647601020 is a wasteful number, since it uses less digits than its factorization.

647601020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943661 (or 2943659 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 647601020 is about 25448.0062087386. The cubic root of 647601020 is about 865.1721042607.

Adding to 647601020 its reverse (20106746), we get a palindrome (667707766).

The spelling of 647601020 in words is "six hundred forty-seven million, six hundred one thousand, twenty".