1156220828 has 24 divisors (see below), whose sum is σ = 2368845024. Its totient is φ = 483436800.

The previous prime is 1156220801. The next prime is 1156220837. The reversal of 1156220828 is 8280226511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502433 + ... + 504728.

It is an arithmetic number, because the mean of its divisors is an integer number (98701876).

Almost surely, 2^1156220828 is an apocalyptic number.

It is an amenable number.

1156220828 is an abundant number, since it is smaller than the sum of its proper divisors (1212624196).

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

1156220828 is a wasteful number, since it uses less digits than its factorization.

1156220828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007213 (or 1007211 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 1156220828 is about 34003.2473155139. The cubic root of 1156220828 is about 1049.5752864322.

The spelling of 1156220828 in words is "one billion, one hundred fifty-six million, two hundred twenty thousand, eight hundred twenty-eight".