398776 has 16 divisors (see below), whose sum is σ = 854640. Its totient is φ = 170880.

The previous prime is 398771. The next prime is 398813. The reversal of 398776 is 677893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3505 + ... + 3616.

It is an arithmetic number, because the mean of its divisors is an integer number (53415).

2³⁹⁸⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

398776 is an abundant number, since it is smaller than the sum of its proper divisors (455864).

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

398776 is a wasteful number, since it uses less digits than its factorization.

398776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134 (or 7130 counting only the distinct ones).

The product of its digits is 63504, while the sum is 40.

The square root of 398776 is about 631.4871336773. The cubic root of 398776 is about 73.6053989423.

The spelling of 398776 in words is "three hundred ninety-eight thousand, seven hundred seventy-six".