1091427450 has 96 divisors (see below), whose sum is σ = 2875262400. Its totient is φ = 273208320.

The previous prime is 1091427439. The next prime is 1091427451. The reversal of 1091427450 is 547241901.

It is a happy number.

It is a super-2 number, since 2×1091427450² = 2382427757227005000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1091427451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 320356 + ... + 323744.

It is an arithmetic number, because the mean of its divisors is an integer number (29950650).

Almost surely, 2^1091427450 is an apocalyptic number.

1091427450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091427450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437631200).

1091427450 is an abundant number, since it is smaller than the sum of its proper divisors (1783834950).

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

1091427450 is a wasteful number, since it uses less digits than its factorization.

1091427450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536 (or 3531 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1091427450 is about 33036.7590722819. The cubic root of 1091427450 is about 1029.5915211884.

The spelling of 1091427450 in words is "one billion, ninety-one million, four hundred twenty-seven thousand, four hundred fifty".