646607052 has 144 divisors (see below), whose sum is σ = 2076884992. Its totient is φ = 165006720.

The previous prime is 646607047. The next prime is 646607111. The reversal of 646607052 is 250706646.

646607052 is a `hidden beast` number, since 6 + 46 + 607 + 0 + 5 + 2 = 666.

It is a super-2 number, since 2×646607052² = 836201359392261408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 646606998 and 646607016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98373 + ... + 104739.

Almost surely, 2^646607052 is an apocalyptic number.

646607052 is a gapful number since it is divisible by the number (62) 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 646607052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038442496).

646607052 is an abundant number, since it is smaller than the sum of its proper divisors (1430277940).

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

646607052 is a wasteful number, since it uses less digits than its factorization.

646607052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6428 (or 6423 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 646607052 is about 25428.4693208223. The cubic root of 646607052 is about 864.7292422204.

The spelling of 646607052 in words is "six hundred forty-six million, six hundred seven thousand, fifty-two".