1091772338 has 16 divisors (see below), whose sum is σ = 1783296000. Its totient is φ = 499321872.

The previous prime is 1091772329. The next prime is 1091772343. The reversal of 1091772338 is 8332771901.

It is a junction number, because it is equal to n+sod(n) for n = 1091772295 and 1091772304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494258 + ... + 496461.

It is an arithmetic number, because the mean of its divisors is an integer number (111456000).

Almost surely, 2^1091772338 is an apocalyptic number.

1091772338 is a deficient number, since it is larger than the sum of its proper divisors (691523662).

1091772338 is a wasteful number, since it uses less digits than its factorization.

1091772338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990769.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1091772338 is about 33041.9784213960. The cubic root of 1091772338 is about 1029.6999591074.

The spelling of 1091772338 in words is "one billion, ninety-one million, seven hundred seventy-two thousand, three hundred thirty-eight".