1081402560 has 504 divisors, whose sum is σ = 4426793280. Its totient is φ = 241532928.

The previous prime is 1081402559. The next prime is 1081402573. The reversal of 1081402560 is 652041801.

It is a tau number, because it is divible by the number of its divisors (504).

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 11148432 + ... + 11148528.

It is an arithmetic number, because the mean of its divisors is an integer number (8783320).

Almost surely, 2^1081402560 is an apocalyptic number.

1081402560 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 1081402560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2213396640).

1081402560 is an abundant number, since it is smaller than the sum of its proper divisors (3345390720).

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

1081402560 is a wasteful number, since it uses less digits than its factorization.

1081402560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1081402560 is about 32884.6857974955. The cubic root of 1081402560 is about 1026.4295136349.

The spelling of 1081402560 in words is "one billion, eighty-one million, four hundred two thousand, five hundred sixty".