398672 has 10 divisors (see below), whose sum is σ = 772458. Its totient is φ = 199328.

The previous prime is 398669. The next prime is 398681. The reversal of 398672 is 276893.

It can be written as a sum of positive squares in only one way, i.e., 364816 + 33856 = 604^2 + 184^2 .

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12443 + ... + 12474.

2³⁹⁸⁶⁷² is an apocalyptic number.

398672 is the 338-th centered heptagonal number.

It is an amenable number.

398672 is a deficient number, since it is larger than the sum of its proper divisors (373786).

398672 is a wasteful number, since it uses less digits than its factorization.

398672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24925 (or 24919 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 398672 is about 631.4047830037. The cubic root of 398672 is about 73.5989996713.

The spelling of 398672 in words is "three hundred ninety-eight thousand, six hundred seventy-two".