1156542828 has 48 divisors (see below), whose sum is σ = 3106333440. Its totient is φ = 328060224.

The previous prime is 1156542817. The next prime is 1156542841. The reversal of 1156542828 is 8282456511.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1156542828.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37851 + ... + 61202.

It is an arithmetic number, because the mean of its divisors is an integer number (64715280).

Almost surely, 2^1156542828 is an apocalyptic number.

It is an amenable number.

1156542828 is an abundant number, since it is smaller than the sum of its proper divisors (1949790612).

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

1156542828 is a wasteful number, since it uses less digits than its factorization.

1156542828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99206 (or 99204 counting only the distinct ones).

The product of its digits is 153600, while the sum is 42.

The square root of 1156542828 is about 34007.9818278004. The cubic root of 1156542828 is about 1049.6727106916.

The spelling of 1156542828 in words is "one billion, one hundred fifty-six million, five hundred forty-two thousand, eight hundred twenty-eight".