2189766474 has 160 divisors (see below), whose sum is σ = 5954826240. Its totient is φ = 587888928.

The previous prime is 2189766463. The next prime is 2189766541. The reversal of 2189766474 is 4746679812.

2189766474 is a `hidden beast` number, since 21 + 8 + 97 + 66 + 474 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2189766474.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 1538127 + ... + 1539549.

It is an arithmetic number, because the mean of its divisors is an integer number (37217664).

Almost surely, 2^2189766474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2189766474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2977413120).

2189766474 is an abundant number, since it is smaller than the sum of its proper divisors (3765059766).

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

2189766474 is a wasteful number, since it uses less digits than its factorization.

2189766474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1517 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 2189766474 is about 46794.9406880701. The cubic root of 2189766474 is about 1298.5717003468.

The spelling of 2189766474 in words is "two billion, one hundred eighty-nine million, seven hundred sixty-six thousand, four hundred seventy-four".