398654 has 8 divisors (see below), whose sum is σ = 610848. Its totient is φ = 195040.

The previous prime is 398627. The next prime is 398669. The reversal of 398654 is 456893.

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

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398654.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027 + ... + 2214.

It is an arithmetic number, because the mean of its divisors is an integer number (76356).

2³⁹⁸⁶⁵⁴ is an apocalyptic number.

398654 is a deficient number, since it is larger than the sum of its proper divisors (212194).

398654 is a wasteful number, since it uses less digits than its factorization.

398654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290.

The product of its digits is 25920, while the sum is 35.

The square root of 398654 is about 631.3905289122. The cubic root of 398654 is about 73.5978919922.

The spelling of 398654 in words is "three hundred ninety-eight thousand, six hundred fifty-four".