1091223936 has 96 divisors (see below), whose sum is σ = 3425614920. Its totient is φ = 330670080.

The previous prime is 1091223899. The next prime is 1091223949. The reversal of 1091223936 is 6393221901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1091223936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30385 + ... + 55728.

Almost surely, 2^1091223936 is an apocalyptic number.

1091223936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1091223936 is an abundant number, since it is smaller than the sum of its proper divisors (2334390984).

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

1091223936 is a wasteful number, since it uses less digits than its factorization.

1091223936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86144 (or 86129 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 1091223936 is about 33033.6788142041. The cubic root of 1091223936 is about 1029.5275226411.

The spelling of 1091223936 in words is "one billion, ninety-one million, two hundred twenty-three thousand, nine hundred thirty-six".