694638 has 48 divisors (see below), whose sum is σ = 1778400. Its totient is φ = 191808.

The previous prime is 694633. The next prime is 694649. The reversal of 694638 is 836496.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4588 + ... + 4736.

It is an arithmetic number, because the mean of its divisors is an integer number (37050).

2⁶⁹⁴⁶³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 694638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889200).

694638 is an abundant number, since it is smaller than the sum of its proper divisors (1083762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

694638 is a wasteful number, since it uses less digits than its factorization.

694638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 198 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 694638 is about 833.4494585756. The cubic root of 694638 is about 88.5631073398.

The spelling of 694638 in words is "six hundred ninety-four thousand, six hundred thirty-eight".