981438 has 8 divisors (see below), whose sum is σ = 1962888. Its totient is φ = 327144.

The previous prime is 981437. The next prime is 981439. The reversal of 981438 is 834189.

It is an interprime number because it is at equal distance from previous prime (981437) and next prime (981439).

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

981438 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 981399 and 981408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81781 + ... + 81792.

It is an arithmetic number, because the mean of its divisors is an integer number (245361).

2⁹⁸¹⁴³⁸ is an apocalyptic number.

981438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

981438 is a wasteful number, since it uses less digits than its factorization.

981438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163578.

The product of its digits is 6912, while the sum is 33.

The square root of 981438 is about 990.6755271026. The cubic root of 981438 is about 99.3773983836.

The spelling of 981438 in words is "nine hundred eighty-one thousand, four hundred thirty-eight".