1121556744 has 288 divisors, whose sum is σ = 3898964160. Its totient is φ = 284993280.

The previous prime is 1121556739. The next prime is 1121556767. The reversal of 1121556744 is 4476551211.

1121556744 is a `hidden beast` number, since 11 + 21 + 556 + 74 + 4 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1121556699 and 1121556708.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3231979 + ... + 3232325.

It is an arithmetic number, because the mean of its divisors is an integer number (13538070).

Almost surely, 2^1121556744 is an apocalyptic number.

1121556744 is a gapful number since it is divisible by the number (14) 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 1121556744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949482080).

1121556744 is an abundant number, since it is smaller than the sum of its proper divisors (2777407416).

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

1121556744 is a wasteful number, since it uses less digits than its factorization.

1121556744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 423 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 1121556744 is about 33489.6512970798. The cubic root of 1121556744 is about 1038.9797514274.

The spelling of 1121556744 in words is "one billion, one hundred twenty-one million, five hundred fifty-six thousand, seven hundred forty-four".