1151023240 has 32 divisors (see below), whose sum is σ = 2592541080. Its totient is φ = 459922432.

The previous prime is 1151023231. The next prime is 1151023241. The reversal of 1151023240 is 423201511.

It can be written as a sum of positive squares in 4 ways, for example, as 1102107204 + 48916036 = 33198^2 + 6994^2 .

It is not an unprimeable number, because it can be changed into a prime (1151023241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24354 + ... + 53806.

Almost surely, 2^1151023240 is an apocalyptic number.

1151023240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151023240 is an abundant number, since it is smaller than the sum of its proper divisors (1441517840).

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

1151023240 is a wasteful number, since it uses less digits than its factorization.

1151023240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30441 (or 30437 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1151023240 is about 33926.7334118686. The cubic root of 1151023240 is about 1048.0001966668. Note that the first 3 decimals are identical.

Adding to 1151023240 its reverse (423201511), we get a palindrome (1574224751).

The spelling of 1151023240 in words is "one billion, one hundred fifty-one million, twenty-three thousand, two hundred forty".