1091867260 has 48 divisors (see below), whose sum is σ = 2521128960. Its totient is φ = 393906240.

The previous prime is 1091867251. The next prime is 1091867291. The reversal of 1091867260 is 627681901.

It is a super-2 number, since 2×1091867260² = 2384348226919815200, which contains 22 as substring.

It is a congruent number.

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, 8401 + ... + 47479.

It is an arithmetic number, because the mean of its divisors is an integer number (52523520).

Almost surely, 2^1091867260 is an apocalyptic number.

1091867260 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 1091867260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260564480).

1091867260 is an abundant number, since it is smaller than the sum of its proper divisors (1429261700).

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

1091867260 is a wasteful number, since it uses less digits than its factorization.

1091867260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39226 (or 39224 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1091867260 is about 33043.4147751106. The cubic root of 1091867260 is about 1029.7297999890.

The spelling of 1091867260 in words is "one billion, ninety-one million, eight hundred sixty-seven thousand, two hundred sixty".