2188450478 has 4 divisors (see below), whose sum is σ = 3282675720. Its totient is φ = 1094225238.

The previous prime is 2188450427. The next prime is 2188450501. The reversal of 2188450478 is 8740548812.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547112618 + ... + 547112621.

It is an arithmetic number, because the mean of its divisors is an integer number (820668930).

Almost surely, 2^2188450478 is an apocalyptic number.

2188450478 is a deficient number, since it is larger than the sum of its proper divisors (1094225242).

2188450478 is a wasteful number, since it uses less digits than its factorization.

2188450478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094225241.

The product of its (nonzero) digits is 573440, while the sum is 47.

The square root of 2188450478 is about 46780.8772683882. The cubic root of 2188450478 is about 1298.3115116255.

The spelling of 2188450478 in words is "two billion, one hundred eighty-eight million, four hundred fifty thousand, four hundred seventy-eight".