2187538 has 8 divisors (see below), whose sum is σ = 3293388. Its totient is φ = 1089744.

The previous prime is 2187529. The next prime is 2187571. The reversal of 2187538 is 8357812.

It can be written as a sum of positive squares in 2 ways, for example, as 1996569 + 190969 = 1413^2 + 437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281 + ... + 2452.

2^2187538 is an apocalyptic number.

2187538 is a deficient number, since it is larger than the sum of its proper divisors (1105850).

2187538 is a wasteful number, since it uses less digits than its factorization.

2187538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028.

The product of its digits is 13440, while the sum is 34.

The square root of 2187538 is about 1479.0327920638. The cubic root of 2187538 is about 129.8131042173.

The spelling of 2187538 in words is "two million, one hundred eighty-seven thousand, five hundred thirty-eight".