1648278720 has 672 divisors, whose sum is σ = 6710086656. Its totient is φ = 381542400.

The previous prime is 1648278689. The next prime is 1648278721. The reversal of 1648278720 is 278728461.

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

It is not an unprimeable number, because it can be changed into a prime (1648278721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35069737 + ... + 35069783.

It is an arithmetic number, because the mean of its divisors is an integer number (9985248).

Almost surely, 2^1648278720 is an apocalyptic number.

1648278720 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 1648278720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3355043328).

1648278720 is an abundant number, since it is smaller than the sum of its proper divisors (5061807936).

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

1648278720 is a wasteful number, since it uses less digits than its factorization.

1648278720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 1648278720 is about 40598.9990024385. Note that the first 3 decimals coincide. The cubic root of 1648278720 is about 1181.2547029291.

The spelling of 1648278720 in words is "one billion, six hundred forty-eight million, two hundred seventy-eight thousand, seven hundred twenty".