981838 has 16 divisors (see below), whose sum is σ = 1730736. Its totient is φ = 411840.

The previous prime is 981823. The next prime is 981887. The reversal of 981838 is 838189.

981838 = T₄₁₇ + T₄₁₈ + ... + T₄₂₇.

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 = 981797 and 981806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (108171).

2⁹⁸¹⁸³⁸ is an apocalyptic number.

981838 is a deficient number, since it is larger than the sum of its proper divisors (748898).

981838 is a wasteful number, since it uses less digits than its factorization.

981838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459.

The product of its digits is 13824, while the sum is 37.

The square root of 981838 is about 990.8773889841. The cubic root of 981838 is about 99.3908974738.

It can be divided in two parts, 98 and 1838, that added together give a square (1936 = 44²).

The spelling of 981838 in words is "nine hundred eighty-one thousand, eight hundred thirty-eight".