1797817320 has 384 divisors, whose sum is σ = 6793113600. Its totient is φ = 408379392.

The previous prime is 1797817253. The next prime is 1797817321. The reversal of 1797817320 is 237187971.

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 (1797817321) 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, 4693849 + ... + 4694231.

It is an arithmetic number, because the mean of its divisors is an integer number (17690400).

Almost surely, 2^1797817320 is an apocalyptic number.

1797817320 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 1797817320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3396556800).

1797817320 is an abundant number, since it is smaller than the sum of its proper divisors (4995296280).

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

1797817320 is a wasteful number, since it uses less digits than its factorization.

1797817320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 1797817320 is about 42400.6759380083. The cubic root of 1797817320 is about 1215.9485150322.

The spelling of 1797817320 in words is "one billion, seven hundred ninety-seven million, eight hundred seventeen thousand, three hundred twenty".