398782 has 8 divisors (see below), whose sum is σ = 612216. Its totient is φ = 194712.

The previous prime is 398771. The next prime is 398813. The reversal of 398782 is 287893.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2233 + ... + 2404.

It is an arithmetic number, because the mean of its divisors is an integer number (76527).

2³⁹⁸⁷⁸² is an apocalyptic number.

398782 is a deficient number, since it is larger than the sum of its proper divisors (213434).

398782 is a wasteful number, since it uses less digits than its factorization.

398782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682.

The product of its digits is 24192, while the sum is 37.

The square root of 398782 is about 631.4918843501. The cubic root of 398782 is about 73.6057680971.

Subtracting from 398782 its reverse (287893), we obtain a square (110889 = 333²).

The spelling of 398782 in words is "three hundred ninety-eight thousand, seven hundred eighty-two".