1097872636 has 18 divisors (see below), whose sum is σ = 2234955408. Its totient is φ = 470516760.

The previous prime is 1097872609. The next prime is 1097872651. The reversal of 1097872636 is 6362787901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 1097872636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2800500 + ... + 2800891.

Almost surely, 2^1097872636 is an apocalyptic number.

It is an amenable number.

1097872636 is an abundant number, since it is smaller than the sum of its proper divisors (1137082772).

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

1097872636 is a wasteful number, since it uses less digits than its factorization.

1097872636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601409 (or 5601400 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 1097872636 is about 33134.1611633673. The cubic root of 1097872636 is about 1031.6142206789.

The spelling of 1097872636 in words is "one billion, ninety-seven million, eight hundred seventy-two thousand, six hundred thirty-six".