1100243240 has 16 divisors (see below), whose sum is σ = 2475547380. Its totient is φ = 440097280.

The previous prime is 1100243233. The next prime is 1100243251. The reversal of 1100243240 is 423420011.

It can be written as a sum of positive squares in 2 ways, for example, as 1073348644 + 26894596 = 32762^2 + 5186^2 .

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, 13753001 + ... + 13753080.

Almost surely, 2^1100243240 is an apocalyptic number.

1100243240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100243240 is an abundant number, since it is smaller than the sum of its proper divisors (1375304140).

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

1100243240 is a wasteful number, since it uses less digits than its factorization.

1100243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27506092 (or 27506088 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1100243240 is about 33169.9146818318. The cubic root of 1100243240 is about 1032.3561982775.

Adding to 1100243240 its reverse (423420011), we get a palindrome (1523663251).

The spelling of 1100243240 in words is "one billion, one hundred million, two hundred forty-three thousand, two hundred forty".