1797985280 has 352 divisors, whose sum is σ = 5645396736. Its totient is φ = 533200896.

The previous prime is 1797985271. The next prime is 1797985283. The reversal of 1797985280 is 825897971.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1797985283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7920527 + ... + 7920753.

Almost surely, 2^1797985280 is an apocalyptic number.

1797985280 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 1797985280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2822698368).

1797985280 is an abundant number, since it is smaller than the sum of its proper divisors (3847411456).

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

1797985280 is a wasteful number, since it uses less digits than its factorization.

1797985280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 56.

The square root of 1797985280 is about 42402.6565205530. The cubic root of 1797985280 is about 1215.9863802722.

The spelling of 1797985280 in words is "one billion, seven hundred ninety-seven million, nine hundred eighty-five thousand, two hundred eighty".