1091023416 has 144 divisors (see below), whose sum is σ = 3639673440. Its totient is φ = 293368320.

The previous prime is 1091023411. The next prime is 1091023447. The reversal of 1091023416 is 6143201901.

It is a self number, because there is not a number n which added to its sum of digits gives 1091023416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091023411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50881 + ... + 69071.

It is an arithmetic number, because the mean of its divisors is an integer number (25275510).

Almost surely, 2^1091023416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091023416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1819836720).

1091023416 is an abundant number, since it is smaller than the sum of its proper divisors (2548650024).

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

1091023416 is a wasteful number, since it uses less digits than its factorization.

1091023416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18234 (or 18220 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1091023416 is about 33030.6435904601. The cubic root of 1091023416 is about 1029.4644578266.

The spelling of 1091023416 in words is "one billion, ninety-one million, twenty-three thousand, four hundred sixteen".