1872638 has 4 divisors (see below), whose sum is σ = 2808960. Its totient is φ = 936318.

The previous prime is 1872631. The next prime is 1872667. The reversal of 1872638 is 8362781.

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

It is a junction number, because it is equal to n+sod(n) for n = 1872598 and 1872607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872631) by changing a digit.

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 as a sum of consecutive naturals, namely, 468158 + ... + 468161.

It is an arithmetic number, because the mean of its divisors is an integer number (702240).

2^1872638 is an apocalyptic number.

1872638 is a deficient number, since it is larger than the sum of its proper divisors (936322).

1872638 is an equidigital number, since it uses as much as digits as its factorization.

1872638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936321.

The product of its digits is 16128, while the sum is 35.

The square root of 1872638 is about 1368.4436415140. The cubic root of 1872638 is about 123.2588024659.

The spelling of 1872638 in words is "one million, eight hundred seventy-two thousand, six hundred thirty-eight".