1155355240 has 32 divisors (see below), whose sum is σ = 2799515880. Its totient is φ = 426592512.

The previous prime is 1155355219. The next prime is 1155355283. The reversal of 1155355240 is 425535511.

It can be written as a sum of positive squares in 4 ways, for example, as 315630756 + 839724484 = 17766^2 + 28978^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110399 + ... + 1111438.

Almost surely, 2^1155355240 is an apocalyptic number.

1155355240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155355240 is an abundant number, since it is smaller than the sum of its proper divisors (1644160640).

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

1155355240 is a wasteful number, since it uses less digits than its factorization.

1155355240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221861 (or 2221857 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1155355240 is about 33990.5169128097. The cubic root of 1155355240 is about 1049.3133045924.

The spelling of 1155355240 in words is "one billion, one hundred fifty-five million, three hundred fifty-five thousand, two hundred forty".