1091904000 has 480 divisors, whose sum is σ = 4075239168. Its totient is φ = 259072000.

The previous prime is 1091903983. The next prime is 1091904007. The reversal of 1091904000 is 4091901.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1091904007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23231977 + ... + 23232023.

Almost surely, 2^1091904000 is an apocalyptic number.

1091904000 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 1091904000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037619584).

1091904000 is an abundant number, since it is smaller than the sum of its proper divisors (2983335168).

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

1091904000 is an equidigital number, since it uses as much as digits as its factorization.

1091904000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1091904000 is about 33043.9707057127. The cubic root of 1091904000 is about 1029.7413495762.

Adding to 1091904000 its reverse (4091901), we get a palindrome (1095995901).

The spelling of 1091904000 in words is "one billion, ninety-one million, nine hundred four thousand".