1155103440 has 40 divisors (see below), whose sum is σ = 3580821408. Its totient is φ = 308027520.

The previous prime is 1155103427. The next prime is 1155103441. The reversal of 1155103440 is 443015511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1155103440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155103441) 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, 2406226 + ... + 2406705.

Almost surely, 2^1155103440 is an apocalyptic number.

1155103440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155103440 is an abundant number, since it is smaller than the sum of its proper divisors (2425717968).

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

1155103440 is a wasteful number, since it uses less digits than its factorization.

1155103440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812947 (or 4812941 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1155103440 is about 33986.8127367072. The cubic root of 1155103440 is about 1049.2370693712.

Adding to 1155103440 its reverse (443015511), we get a palindrome (1598118951).

The spelling of 1155103440 in words is "one billion, one hundred fifty-five million, one hundred three thousand, four hundred forty".