1091253844 has 12 divisors (see below), whose sum is σ = 1913786784. Its totient is φ = 544457624.

The previous prime is 1091253841. The next prime is 1091253881. The reversal of 1091253844 is 4483521901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091253841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290224 + ... + 293959.

It is an arithmetic number, because the mean of its divisors is an integer number (159482232).

Almost surely, 2^1091253844 is an apocalyptic number.

It is an amenable number.

1091253844 is a deficient number, since it is larger than the sum of its proper divisors (822532940).

1091253844 is a wasteful number, since it uses less digits than its factorization.

1091253844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584654 (or 584652 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1091253844 is about 33034.1315006161. The cubic root of 1091253844 is about 1029.5369282351.

The spelling of 1091253844 in words is "one billion, ninety-one million, two hundred fifty-three thousand, eight hundred forty-four".