2173774128 has 20 divisors (see below), whose sum is σ = 5615583288. Its totient is φ = 724591360.

The previous prime is 2173774123. The next prime is 2173774129. The reversal of 2173774128 is 8214773712.

It is a self number, because there is not a number n which added to its sum of digits gives 2173774128.

It is not an unprimeable number, because it can be changed into a prime (2173774123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22643433 + ... + 22643528.

Almost surely, 2^2173774128 is an apocalyptic number.

It is an amenable number.

2173774128 is an abundant number, since it is smaller than the sum of its proper divisors (3441809160).

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

2173774128 is a wasteful number, since it uses less digits than its factorization.

2173774128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45286972 (or 45286966 counting only the distinct ones).

The product of its digits is 131712, while the sum is 42.

The square root of 2173774128 is about 46623.7506856752. The cubic root of 2173774128 is about 1295.4027216543.

The spelling of 2173774128 in words is "two billion, one hundred seventy-three million, seven hundred seventy-four thousand, one hundred twenty-eight".