1154552140 has 48 divisors (see below), whose sum is σ = 2781241344. Its totient is φ = 394372800.

The previous prime is 1154552129. The next prime is 1154552167. The reversal of 1154552140 is 412554511.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1154552099 and 1154552108.

It is an unprimeable number.

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, 22725 + ... + 53155.

It is an arithmetic number, because the mean of its divisors is an integer number (57942528).

Almost surely, 2^1154552140 is an apocalyptic number.

1154552140 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 1154552140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390620672).

1154552140 is an abundant number, since it is smaller than the sum of its proper divisors (1626689204).

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

1154552140 is a wasteful number, since it uses less digits than its factorization.

1154552140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30718 (or 30716 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1154552140 is about 33978.7012700603. The cubic root of 1154552140 is about 1049.0701185377.

The spelling of 1154552140 in words is "one billion, one hundred fifty-four million, five hundred fifty-two thousand, one hundred forty".