648228528 has 40 divisors (see below), whose sum is σ = 1860657200. Its totient is φ = 216076032.

The previous prime is 648228499. The next prime is 648228533. The reversal of 648228528 is 825822846.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749833 + ... + 750696.

It is an arithmetic number, because the mean of its divisors is an integer number (46516430).

Almost surely, 2^648228528 is an apocalyptic number.

It is an amenable number.

648228528 is an abundant number, since it is smaller than the sum of its proper divisors (1212428672).

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

648228528 is a wasteful number, since it uses less digits than its factorization.

648228528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500546 (or 1500534 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 648228528 is about 25460.3324408775. The cubic root of 648228528 is about 865.4514568979.

The spelling of 648228528 in words is "six hundred forty-eight million, two hundred twenty-eight thousand, five hundred twenty-eight".