648581088 has 24 divisors (see below), whose sum is σ = 1702525608. Its totient is φ = 216193664.

The previous prime is 648581069. The next prime is 648581099. The reversal of 648581088 is 880185846.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×648581088² = 841314855422527488, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3377931 + ... + 3378122.

It is an arithmetic number, because the mean of its divisors is an integer number (70938567).

Almost surely, 2^648581088 is an apocalyptic number.

It is an amenable number.

648581088 is an abundant number, since it is smaller than the sum of its proper divisors (1053944520).

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

648581088 is a wasteful number, since it uses less digits than its factorization.

648581088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756066 (or 6756058 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 48.

The square root of 648581088 is about 25467.2552113493. The cubic root of 648581088 is about 865.6083296941.

The spelling of 648581088 in words is "six hundred forty-eight million, five hundred eighty-one thousand, eighty-eight".