1081057280 has 56 divisors (see below), whose sum is σ = 2594477412. Its totient is φ = 432406528.

The previous prime is 1081057267. The next prime is 1081057283. The reversal of 1081057280 is 827501801.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1069551616 + 11505664 = 32704^2 + 3392^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1081057283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27764 + ... + 54156.

Almost surely, 2^1081057280 is an apocalyptic number.

1081057280 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 1081057280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297238706).

1081057280 is an abundant number, since it is smaller than the sum of its proper divisors (1513420132).

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

1081057280 is an frugal number, since it uses more digits than its factorization.

1081057280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26424 (or 26400 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 1081057280 is about 32879.4355182689. The cubic root of 1081057280 is about 1026.3202594368.

The spelling of 1081057280 in words is "one billion, eighty-one million, fifty-seven thousand, two hundred eighty".