1147385556 has 72 divisors (see below), whose sum is σ = 3075456384. Its totient is φ = 359435520.

The previous prime is 1147385543. The next prime is 1147385581. The reversal of 1147385556 is 6555837411.

1147385556 is a `hidden beast` number, since 1 + 14 + 7 + 3 + 85 + 556 = 666.

It is a super-2 number, since 2×1147385556² = 2632987228234858272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 752611 + ... + 754133.

It is an arithmetic number, because the mean of its divisors is an integer number (42714672).

Almost surely, 2^1147385556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1147385556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1537728192).

1147385556 is an abundant number, since it is smaller than the sum of its proper divisors (1928070828).

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

1147385556 is a wasteful number, since it uses less digits than its factorization.

1147385556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781 (or 2776 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 1147385556 is about 33873.0801079559. The cubic root of 1147385556 is about 1046.8950012794.

The spelling of 1147385556 in words is "one billion, one hundred forty-seven million, three hundred eighty-five thousand, five hundred fifty-six".