1121575440 has 80 divisors (see below), whose sum is σ = 3491490816. Its totient is φ = 297830400.

The previous prime is 1121575423. The next prime is 1121575451. The reversal of 1121575440 is 445751211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1121575440² = 2515862935222387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1121575398 and 1121575407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48145 + ... + 67535.

Almost surely, 2^1121575440 is an apocalyptic number.

1121575440 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 1121575440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1745745408).

1121575440 is an abundant number, since it is smaller than the sum of its proper divisors (2369915376).

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

1121575440 is a wasteful number, since it uses less digits than its factorization.

1121575440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19648 (or 19642 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 1121575440 is about 33489.9304269209. The cubic root of 1121575440 is about 1038.9855245511.

The spelling of 1121575440 in words is "one billion, one hundred twenty-one million, five hundred seventy-five thousand, four hundred forty".