981378 has 12 divisors (see below), whose sum is σ = 2126358. Its totient is φ = 327120.

The previous prime is 981377. The next prime is 981391. The reversal of 981378 is 873189.

It can be written as a sum of positive squares in only one way, i.e., 870489 + 110889 = 933^2 + 333^2 .

It is not an unprimeable number, because it can be changed into a prime (981373) 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 5 ways as a sum of consecutive naturals, for example, 27243 + ... + 27278.

2⁹⁸¹³⁷⁸ is an apocalyptic number.

981378 is an abundant number, since it is smaller than the sum of its proper divisors (1144980).

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

981378 is a wasteful number, since it uses less digits than its factorization.

981378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54529 (or 54526 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 981378 is about 990.6452442726. The cubic root of 981378 is about 99.3753732038.

The spelling of 981378 in words is "nine hundred eighty-one thousand, three hundred seventy-eight".