1648442880 has 320 divisors, whose sum is σ = 6693857280. Its totient is φ = 376676352.

The previous prime is 1648442879. The next prime is 1648442897. The reversal of 1648442880 is 882448461.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 482137 + ... + 485543.

It is an arithmetic number, because the mean of its divisors is an integer number (20918304).

Almost surely, 2^1648442880 is an apocalyptic number.

1648442880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1648442880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3346928640).

1648442880 is an abundant number, since it is smaller than the sum of its proper divisors (5045414400).

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

1648442880 is an equidigital number, since it uses as much as digits as its factorization.

1648442880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The square root of 1648442880 is about 40601.0206768254. The cubic root of 1648442880 is about 1181.2939172384.

The spelling of 1648442880 in words is "one billion, six hundred forty-eight million, four hundred forty-two thousand, eight hundred eighty".