1023120280 has 128 divisors (see below), whose sum is σ = 2924974080. Its totient is φ = 313320960.

The previous prime is 1023120251. The next prime is 1023120283. The reversal of 1023120280 is 820213201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023120283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108307 + ... + 117373.

It is an arithmetic number, because the mean of its divisors is an integer number (22851360).

Almost surely, 2^1023120280 is an apocalyptic number.

1023120280 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 1023120280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462487040).

1023120280 is an abundant number, since it is smaller than the sum of its proper divisors (1901853800).

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

1023120280 is a wasteful number, since it uses less digits than its factorization.

1023120280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9129 (or 9125 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1023120280 is about 31986.2514215092. The cubic root of 1023120280 is about 1007.6481171814.

Adding to 1023120280 its reverse (820213201), we get a palindrome (1843333481).

The spelling of 1023120280 in words is "one billion, twenty-three million, one hundred twenty thousand, two hundred eighty".