2192431878 has 48 divisors (see below), whose sum is σ = 5846489376. Its totient is φ = 578223360.

The previous prime is 2192431873. The next prime is 2192431883. The reversal of 2192431878 is 8781342912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2192431873) and next prime (2192431883).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2192431873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 667603 + ... + 670878.

It is an arithmetic number, because the mean of its divisors is an integer number (121801862).

Almost surely, 2^2192431878 is an apocalyptic number.

2192431878 is an abundant number, since it is smaller than the sum of its proper divisors (3654057498).

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

2192431878 is a wasteful number, since it uses less digits than its factorization.

2192431878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338509 (or 1338506 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 2192431878 is about 46823.4116441765. The cubic root of 2192431878 is about 1299.0983645447.

The spelling of 2192431878 in words is "two billion, one hundred ninety-two million, four hundred thirty-one thousand, eight hundred seventy-eight".