1145154440 has 64 divisors (see below), whose sum is σ = 2654262000. Its totient is φ = 444331008.

The previous prime is 1145154427. The next prime is 1145154449. The reversal of 1145154440 is 444515411.

It can be written as a sum of positive squares in 8 ways, for example, as 989354116 + 155800324 = 31454^2 + 12482^2 .

It is a super-2 number, since 2×1145154440² = 2622757382903427200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145154449) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 586586 + ... + 588534.

Almost surely, 2^1145154440 is an apocalyptic number.

1145154440 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 1145154440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327131000).

1145154440 is an abundant number, since it is smaller than the sum of its proper divisors (1509107560).

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

1145154440 is a wasteful number, since it uses less digits than its factorization.

1145154440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 1145154440 is about 33840.1306144051. The cubic root of 1145154440 is about 1046.2159909905.

Adding to 1145154440 its reverse (444515411), we get a palindrome (1589669851).

The spelling of 1145154440 in words is "one billion, one hundred forty-five million, one hundred fifty-four thousand, four hundred forty".