1097818236 has 18 divisors (see below), whose sum is σ = 2775040632. Its totient is φ = 365939400.

The previous prime is 1097818223. The next prime is 1097818237. The reversal of 1097818236 is 6328187901.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1097818191 and 1097818200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097818237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15247440 + ... + 15247511.

It is an arithmetic number, because the mean of its divisors is an integer number (154168924).

Almost surely, 2^1097818236 is an apocalyptic number.

It is an amenable number.

1097818236 is an abundant number, since it is smaller than the sum of its proper divisors (1677222396).

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

1097818236 is a wasteful number, since it uses less digits than its factorization.

1097818236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30494961 (or 30494956 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1097818236 is about 33133.3402481549. The cubic root of 1097818236 is about 1031.5971814406.

The spelling of 1097818236 in words is "one billion, ninety-seven million, eight hundred eighteen thousand, two hundred thirty-six".