1123153240 has 32 divisors (see below), whose sum is σ = 2756831760. Its totient is φ = 408419200.

The previous prime is 1123153193. The next prime is 1123153243. The reversal of 1123153240 is 423513211.

It is a happy number.

It is a super-2 number, since 2×1123153240² = 2522946401044995200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123153243) 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, 1275871 + ... + 1276750.

Almost surely, 2^1123153240 is an apocalyptic number.

1123153240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123153240 is an abundant number, since it is smaller than the sum of its proper divisors (1633678520).

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

1123153240 is a wasteful number, since it uses less digits than its factorization.

1123153240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552643 (or 2552639 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1123153240 is about 33513.4784825449. The cubic root of 1123153240 is about 1039.4725012301.

Adding to 1123153240 its reverse (423513211), we get a palindrome (1546666451).

The spelling of 1123153240 in words is "one billion, one hundred twenty-three million, one hundred fifty-three thousand, two hundred forty".