2195340840 has 256 divisors, whose sum is σ = 9123840000. Its totient is φ = 456157440.

The previous prime is 2195340793. The next prime is 2195340911. The reversal of 2195340840 is 480435912.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2195340795 and 2195340804.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69961 + ... + 96359.

It is an arithmetic number, because the mean of its divisors is an integer number (35640000).

Almost surely, 2^2195340840 is an apocalyptic number.

2195340840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2195340840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4561920000).

2195340840 is an abundant number, since it is smaller than the sum of its proper divisors (6928499160).

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

2195340840 is a wasteful number, since it uses less digits than its factorization.

2195340840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26437 (or 26427 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 2195340840 is about 46854.4644617778. The cubic root of 2195340840 is about 1299.6726670932.

The spelling of 2195340840 in words is "two billion, one hundred ninety-five million, three hundred forty thousand, eight hundred forty".