648614928 has 160 divisors (see below), whose sum is σ = 1896128640. Its totient is φ = 189665280.

The previous prime is 648614909. The next prime is 648614947. The reversal of 648614928 is 829416846.

It is an interprime number because it is at equal distance from previous prime (648614909) and next prime (648614947).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1320763 + ... + 1321253.

It is an arithmetic number, because the mean of its divisors is an integer number (11850804).

Almost surely, 2^648614928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648614928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948064320).

648614928 is an abundant number, since it is smaller than the sum of its proper divisors (1247513712).

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

648614928 is a wasteful number, since it uses less digits than its factorization.

648614928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 611 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 648614928 is about 25467.9195852351. The cubic root of 648614928 is about 865.6233839292.

The spelling of 648614928 in words is "six hundred forty-eight million, six hundred fourteen thousand, nine hundred twenty-eight".