1156678120 has 64 divisors (see below), whose sum is σ = 2821472640. Its totient is φ = 424224000.

The previous prime is 1156678099. The next prime is 1156678139. The reversal of 1156678120 is 218766511.

It is a self number, because there is not a number n which added to its sum of digits gives 1156678120.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 71155 + ... + 85885.

It is an arithmetic number, because the mean of its divisors is an integer number (44085510).

Almost surely, 2^1156678120 is an apocalyptic number.

1156678120 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 1156678120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410736320).

1156678120 is an abundant number, since it is smaller than the sum of its proper divisors (1664794520).

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

1156678120 is a wasteful number, since it uses less digits than its factorization.

1156678120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14906 (or 14902 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1156678120 is about 34009.9708909020. The cubic root of 1156678120 is about 1049.7136392186.

It can be divided in two parts, 11566781 and 20, that added together give a square (11566801 = 3401²).

The spelling of 1156678120 in words is "one billion, one hundred fifty-six million, six hundred seventy-eight thousand, one hundred twenty".