2031638 has 12 divisors (see below), whose sum is σ = 3545172. Its totient is φ = 870660.

The previous prime is 2031611. The next prime is 2031671. The reversal of 2031638 is 8361302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10268 + ... + 10463.

It is an arithmetic number, because the mean of its divisors is an integer number (295431).

2^2031638 is an apocalyptic number.

2031638 is a deficient number, since it is larger than the sum of its proper divisors (1513534).

2031638 is a wasteful number, since it uses less digits than its factorization.

2031638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20747 (or 20740 counting only the distinct ones).

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

The square root of 2031638 is about 1425.3553942789. The cubic root of 2031638 is about 126.6529886739.

The spelling of 2031638 in words is "two million, thirty-one thousand, six hundred thirty-eight".