2197697238 has 64 divisors (see below), whose sum is σ = 5335372800. Its totient is φ = 665016480.

The previous prime is 2197697237. The next prime is 2197697239. The reversal of 2197697238 is 8327967912.

It is an interprime number because it is at equal distance from previous prime (2197697237) and next prime (2197697239).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197697233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490195 + ... + 494657.

It is an arithmetic number, because the mean of its divisors is an integer number (83365200).

Almost surely, 2^2197697238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2197697238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2667686400).

2197697238 is an abundant number, since it is smaller than the sum of its proper divisors (3137675562).

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

2197697238 is a wasteful number, since it uses less digits than its factorization.

2197697238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5314 (or 5308 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 2197697238 is about 46879.6036459354. The cubic root of 2197697238 is about 1300.1375077425.

The spelling of 2197697238 in words is "two billion, one hundred ninety-seven million, six hundred ninety-seven thousand, two hundred thirty-eight".