913638 has 32 divisors (see below), whose sum is σ = 2027520. Its totient is φ = 272160.

The previous prime is 913637. The next prime is 913639. The reversal of 913638 is 836319.

It is an interprime number because it is at equal distance from previous prime (913637) and next prime (913639).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 913638.

It is not an unprimeable number, because it can be changed into a prime (913637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7131 + ... + 7257.

It is an arithmetic number, because the mean of its divisors is an integer number (63360).

2⁹¹³⁶³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 913638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013760).

913638 is an abundant number, since it is smaller than the sum of its proper divisors (1113882).

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

913638 is a wasteful number, since it uses less digits than its factorization.

913638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 3888, while the sum is 30.

The square root of 913638 is about 955.8441295525. The cubic root of 913638 is about 97.0341750838.

It can be divided in two parts, 913 and 638, that added together give a palindrome (1551).

The spelling of 913638 in words is "nine hundred thirteen thousand, six hundred thirty-eight".