648245628 has 36 divisors (see below), whose sum is σ = 1639729728. Its totient is φ = 215935680.

The previous prime is 648245623. The next prime is 648245677. The reversal of 648245628 is 826542846.

648245628 is a `hidden beast` number, since 6 + 4 + 82 + 4 + 562 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×648245628² = 840444788442228768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648245623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56725 + ... + 67187.

It is an arithmetic number, because the mean of its divisors is an integer number (45548048).

Almost surely, 2^648245628 is an apocalyptic number.

It is an amenable number.

648245628 is an abundant number, since it is smaller than the sum of its proper divisors (991484100).

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

648245628 is a wasteful number, since it uses less digits than its factorization.

648245628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12194 (or 12189 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 648245628 is about 25460.6682551735. The cubic root of 648245628 is about 865.4590669147.

The spelling of 648245628 in words is "six hundred forty-eight million, two hundred forty-five thousand, six hundred twenty-eight".