2197780236 has 192 divisors, whose sum is σ = 6220569600. Its totient is φ = 668736000.

The previous prime is 2197780231. The next prime is 2197780241. The reversal of 2197780236 is 6320877912.

It is an interprime number because it is at equal distance from previous prime (2197780231) and next prime (2197780241).

It is a super-3 number, since 3×2197780236³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2197780191 and 2197780200.

It is not an unprimeable number, because it can be changed into a prime (2197780231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12703846 + ... + 12704018.

It is an arithmetic number, because the mean of its divisors is an integer number (32398800).

Almost surely, 2^2197780236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2197780236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110284800).

2197780236 is an abundant number, since it is smaller than the sum of its proper divisors (4022789364).

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

2197780236 is a wasteful number, since it uses less digits than its factorization.

2197780236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 2197780236 is about 46880.4888626388. The cubic root of 2197780236 is about 1300.1538744881.

The spelling of 2197780236 in words is "two billion, one hundred ninety-seven million, seven hundred eighty thousand, two hundred thirty-six".