2188638462 has 32 divisors (see below), whose sum is σ = 4807998720. Its totient is φ = 661098240.

The previous prime is 2188638461. The next prime is 2188638479. The reversal of 2188638462 is 2648368812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188638461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414739 + ... + 419982.

It is an arithmetic number, because the mean of its divisors is an integer number (150249960).

Almost surely, 2^2188638462 is an apocalyptic number.

2188638462 is an abundant number, since it is smaller than the sum of its proper divisors (2619360258).

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

2188638462 is a wasteful number, since it uses less digits than its factorization.

2188638462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834768.

The product of its digits is 884736, while the sum is 48.

The square root of 2188638462 is about 46782.8864222805. The cubic root of 2188638462 is about 1298.3486847770.

The spelling of 2188638462 in words is "two billion, one hundred eighty-eight million, six hundred thirty-eight thousand, four hundred sixty-two".