398730 has 16 divisors (see below), whose sum is σ = 957024. Its totient is φ = 106320.

The previous prime is 398729. The next prime is 398731. The reversal of 398730 is 37893.

It is an interprime number because it is at equal distance from previous prime (398729) and next prime (398731).

It is a super-2 number, since 2×398730² = 317971225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 13291 = 398730 / (3 + 9 + 8 + 7 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (398731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6616 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (59814).

2³⁹⁸⁷³⁰ is an apocalyptic number.

398730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398730 is an abundant number, since it is smaller than the sum of its proper divisors (558294).

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

398730 is a wasteful number, since it uses less digits than its factorization.

398730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13301.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 398730 is about 631.4507106655. The cubic root of 398730 is about 73.6025686328.

It can be divided in two parts, 398 and 730, that added together give a triangular number (1128 = T₄₇).

The spelling of 398730 in words is "three hundred ninety-eight thousand, seven hundred thirty".