1155085280 has 24 divisors (see below), whose sum is σ = 2728889352. Its totient is φ = 462034048.

The previous prime is 1155085273. The next prime is 1155085331. The reversal of 1155085280 is 825805511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155085280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3609482 + ... + 3609801.

It is an arithmetic number, because the mean of its divisors is an integer number (113703723).

Almost surely, 2^1155085280 is an apocalyptic number.

1155085280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155085280 is an abundant number, since it is smaller than the sum of its proper divisors (1573804072).

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

1155085280 is an equidigital number, since it uses as much as digits as its factorization.

1155085280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219298 (or 7219290 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 35.

The square root of 1155085280 is about 33986.5455732118. The cubic root of 1155085280 is about 1049.2315708030.

The spelling of 1155085280 in words is "one billion, one hundred fifty-five million, eighty-five thousand, two hundred eighty".