1091452080 has 80 divisors (see below), whose sum is σ = 3389649120. Its totient is φ = 290525184.

The previous prime is 1091452079. The next prime is 1091452081. The reversal of 1091452080 is 802541901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1091452079) and next prime (1091452081).

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

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

It is not an unprimeable number, because it can be changed into a prime (1091452081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138486 + ... + 146154.

It is an arithmetic number, because the mean of its divisors is an integer number (42370614).

Almost surely, 2^1091452080 is an apocalyptic number.

1091452080 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 1091452080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1694824560).

1091452080 is an abundant number, since it is smaller than the sum of its proper divisors (2298197040).

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

1091452080 is a wasteful number, since it uses less digits than its factorization.

1091452080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8278 (or 8272 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1091452080 is about 33037.1318367682. The cubic root of 1091452080 is about 1029.5992659843.

Adding to 1091452080 its reverse (802541901), we get a palindrome (1893993981).

The spelling of 1091452080 in words is "one billion, ninety-one million, four hundred fifty-two thousand, eighty".