646153028 has 12 divisors (see below), whose sum is σ = 1130949120. Its totient is φ = 323024712.

The previous prime is 646152979. The next prime is 646153033. The reversal of 646153028 is 820351646.

It is a super-3 number, since 3×646153028³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34133 + ... + 49571.

It is an arithmetic number, because the mean of its divisors is an integer number (94245760).

Almost surely, 2^646153028 is an apocalyptic number.

It is an amenable number.

646153028 is a deficient number, since it is larger than the sum of its proper divisors (484796092).

646153028 is a wasteful number, since it uses less digits than its factorization.

646153028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25906 (or 25904 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 646153028 is about 25419.5402790845. The cubic root of 646153028 is about 864.5268010026.

The spelling of 646153028 in words is "six hundred forty-six million, one hundred fifty-three thousand, twenty-eight".