398770 has 8 divisors (see below), whose sum is σ = 717804. Its totient is φ = 159504.

The previous prime is 398759. The next prime is 398771. The reversal of 398770 is 77893.

It can be written as a sum of positive squares in 2 ways, for example, as 370881 + 27889 = 609^2 + 167^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398770.

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, 19929 + ... + 19948.

2³⁹⁸⁷⁷⁰ is an apocalyptic number.

398770 is a deficient number, since it is larger than the sum of its proper divisors (319034).

398770 is a wasteful number, since it uses less digits than its factorization.

398770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39884.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 398770 is about 631.4823829688. The cubic root of 398770 is about 73.6050297839.

The spelling of 398770 in words is "three hundred ninety-eight thousand, seven hundred seventy".