2197409860 has 24 divisors (see below), whose sum is σ = 4618194840. Its totient is φ = 878271744.

The previous prime is 2197409777. The next prime is 2197409861. The reversal of 2197409860 is 689047912.

It can be written as a sum of positive squares in 4 ways, for example, as 666878976 + 1530530884 = 25824^2 + 39122^2 .

It is a super-2 number, since 2×2197409860² = 9657220185650439200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2197409860.

It is not an unprimeable number, because it can be changed into a prime (2197409861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16839 + ... + 68398.

It is an arithmetic number, because the mean of its divisors is an integer number (192424785).

Almost surely, 2^2197409860 is an apocalyptic number.

2197409860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2197409860 is an abundant number, since it is smaller than the sum of its proper divisors (2420784980).

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

2197409860 is a wasteful number, since it uses less digits than its factorization.

2197409860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86535 (or 86533 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 2197409860 is about 46876.5384814195. The cubic root of 2197409860 is about 1300.0808352102.

The spelling of 2197409860 in words is "two billion, one hundred ninety-seven million, four hundred nine thousand, eight hundred sixty".