842638 has 16 divisors (see below), whose sum is σ = 1326960. Its totient is φ = 400896.

The previous prime is 842627. The next prime is 842657. The reversal of 842638 is 836248.

It is a happy number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4270 + ... + 4462.

It is an arithmetic number, because the mean of its divisors is an integer number (82935).

2⁸⁴²⁶³⁸ is an apocalyptic number.

842638 is a deficient number, since it is larger than the sum of its proper divisors (484322).

842638 is a wasteful number, since it uses less digits than its factorization.

842638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its digits is 9216, while the sum is 31.

The square root of 842638 is about 917.9531578463. The cubic root of 842638 is about 94.4525484267.

It can be divided in two parts, 8426 and 38, that added together give a square (8464 = 92²).

The spelling of 842638 in words is "eight hundred forty-two thousand, six hundred thirty-eight".