2195176788 has 120 divisors (see below), whose sum is σ = 6622808192. Its totient is φ = 621038016.

The previous prime is 2195176771. The next prime is 2195176807. The reversal of 2195176788 is 8876715912.

It is a super-2 number, since 2×2195176788² = 9637602261147993888, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 228906 + ... + 238302.

Almost surely, 2^2195176788 is an apocalyptic number.

2195176788 is a gapful number since it is divisible by the number (28) 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 2195176788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3311404096).

2195176788 is an abundant number, since it is smaller than the sum of its proper divisors (4427631404).

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

2195176788 is a wasteful number, since it uses less digits than its factorization.

2195176788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523 (or 9512 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The square root of 2195176788 is about 46852.7137741241. The cubic root of 2195176788 is about 1299.6402925893.

The spelling of 2195176788 in words is "two billion, one hundred ninety-five million, one hundred seventy-six thousand, seven hundred eighty-eight".