2130638 has 4 divisors (see below), whose sum is σ = 3195960. Its totient is φ = 1065318.

The previous prime is 2130631. The next prime is 2130671. The reversal of 2130638 is 8360312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532658 + ... + 532661.

It is an arithmetic number, because the mean of its divisors is an integer number (798990).

2^2130638 is an apocalyptic number.

2130638 is a deficient number, since it is larger than the sum of its proper divisors (1065322).

2130638 is a wasteful number, since it uses less digits than its factorization.

2130638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065321.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2130638 is about 1459.6705107660. The cubic root of 2130638 is about 128.6776801881.

It can be divided in two parts, 21306 and 38, that multiplied together give a triangular number (809628 = T₁₂₇₂).

The spelling of 2130638 in words is "two million, one hundred thirty thousand, six hundred thirty-eight".