1156281948 has 72 divisors (see below), whose sum is σ = 2974739040. Its totient is φ = 378639360.

The previous prime is 1156281947. The next prime is 1156281961. The reversal of 1156281948 is 8491826511.

It is a happy number.

1156281948 is a `hidden beast` number, since 1 + 1 + 5 + 628 + 19 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156281947) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 533988 + ... + 536148.

It is an arithmetic number, because the mean of its divisors is an integer number (41315820).

Almost surely, 2^1156281948 is an apocalyptic number.

1156281948 is a gapful number since it is divisible by the number (18) 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 1156281948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487369520).

1156281948 is an abundant number, since it is smaller than the sum of its proper divisors (1818457092).

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

1156281948 is a wasteful number, since it uses less digits than its factorization.

1156281948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427 (or 2422 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 1156281948 is about 34004.1460413285. The cubic root of 1156281948 is about 1049.5937802786.

The spelling of 1156281948 in words is "one billion, one hundred fifty-six million, two hundred eighty-one thousand, nine hundred forty-eight".