838642 has 16 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 349488.

The previous prime is 838633. The next prime is 838657. The reversal of 838642 is 246838.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

838642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292 + ... + 1327.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2⁸³⁸⁶⁴² is an apocalyptic number.

838642 is a deficient number, since it is larger than the sum of its proper divisors (638798).

838642 is a wasteful number, since it uses less digits than its factorization.

838642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665.

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

The square root of 838642 is about 915.7739895848. The cubic root of 838642 is about 94.3030059239.

It can be divided in two parts, 8 and 38642, that multiplied together give a square (309136 = 556²).

The spelling of 838642 in words is "eight hundred thirty-eight thousand, six hundred forty-two".