2195861400 has 240 divisors, whose sum is σ = 7717307400. Its totient is φ = 578603520.

The previous prime is 2195861399. The next prime is 2195861443. The reversal of 2195861400 is 41685912.

2195861400 is a `hidden beast` number, since 2 + 195 + 8 + 61 + 400 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1441039 + ... + 1442561.

Almost surely, 2^2195861400 is an apocalyptic number.

2195861400 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 2195861400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3858653700).

2195861400 is an abundant number, since it is smaller than the sum of its proper divisors (5521446000).

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

2195861400 is a wasteful number, since it uses less digits than its factorization.

2195861400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 2195861400 is about 46860.0192061420. The cubic root of 2195861400 is about 1299.7753852563.

The spelling of 2195861400 in words is "two billion, one hundred ninety-five million, eight hundred sixty-one thousand, four hundred".