2187426444 has 36 divisors (see below), whose sum is σ = 5937301944. Its totient is φ = 624978816.

The previous prime is 2187426427. The next prime is 2187426457. The reversal of 2187426444 is 4446247812.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 2187426396 and 2187426405.

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 11 ways as a sum of consecutive naturals, for example, 1859469 + ... + 1860644.

It is an arithmetic number, because the mean of its divisors is an integer number (164925054).

Almost surely, 2^2187426444 is an apocalyptic number.

It is an amenable number.

2187426444 is an abundant number, since it is smaller than the sum of its proper divisors (3749875500).

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

2187426444 is a wasteful number, since it uses less digits than its factorization.

2187426444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720134 (or 3720125 counting only the distinct ones).

The product of its digits is 344064, while the sum is 42.

The square root of 2187426444 is about 46769.9309813474. The cubic root of 2187426444 is about 1298.1089752389.

The spelling of 2187426444 in words is "two billion, one hundred eighty-seven million, four hundred twenty-six thousand, four hundred forty-four".