899638 has 8 divisors (see below), whose sum is σ = 1396080. Its totient is φ = 434280.

The previous prime is 899617. The next prime is 899659. The reversal of 899638 is 836998.

It is an interprime number because it is at equal distance from previous prime (899617) and next prime (899659).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 899594 and 899603.

It is a congruent number.

It is an unprimeable number.

899638 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 3 ways as a sum of consecutive naturals, for example, 7698 + ... + 7813.

It is an arithmetic number, because the mean of its divisors is an integer number (174510).

2⁸⁹⁹⁶³⁸ is an apocalyptic number.

899638 is a deficient number, since it is larger than the sum of its proper divisors (496442).

899638 is a wasteful number, since it uses less digits than its factorization.

899638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15542.

The product of its digits is 93312, while the sum is 43.

The square root of 899638 is about 948.4924881094. The cubic root of 899638 is about 96.5359920151.

The spelling of 899638 in words is "eight hundred ninety-nine thousand, six hundred thirty-eight".