1097990238 has 64 divisors (see below), whose sum is σ = 2344204800. Its totient is φ = 342114432.

The previous prime is 1097990219. The next prime is 1097990273. The reversal of 1097990238 is 8320997901.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1377256 + ... + 1378052.

It is an arithmetic number, because the mean of its divisors is an integer number (36628200).

Almost surely, 2^1097990238 is an apocalyptic number.

1097990238 is an abundant number, since it is smaller than the sum of its proper divisors (1246214562).

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

1097990238 is a wasteful number, since it uses less digits than its factorization.

1097990238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 1097990238 is about 33135.9357495756. The cubic root of 1097990238 is about 1031.6510542059.

The spelling of 1097990238 in words is "one billion, ninety-seven million, nine hundred ninety thousand, two hundred thirty-eight".