1154812820 has 24 divisors (see below), whose sum is σ = 2771551104. Its totient is φ = 395935776.

The previous prime is 1154812807. The next prime is 1154812829. The reversal of 1154812820 is 282184511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154812829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4124192 + ... + 4124471.

It is an arithmetic number, because the mean of its divisors is an integer number (115481296).

Almost surely, 2^1154812820 is an apocalyptic number.

1154812820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1154812820 is an abundant number, since it is smaller than the sum of its proper divisors (1616738284).

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

1154812820 is a wasteful number, since it uses less digits than its factorization.

1154812820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8248679 (or 8248677 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 1154812820 is about 33982.5369859285. The cubic root of 1154812820 is about 1049.1490671937.

The spelling of 1154812820 in words is "one billion, one hundred fifty-four million, eight hundred twelve thousand, eight hundred twenty".