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398260 = 22519913
BaseRepresentation
bin1100001001110110100
3202020022101
41201032310
5100221020
612311444
73246052
oct1411664
9666271
10398260
11252245
12172584
1310c375
14a51d2
157d00a
hex613b4

398260 has 12 divisors (see below), whose sum is σ = 836388. Its totient is φ = 159296.

The previous prime is 398249. The next prime is 398261. The reversal of 398260 is 62893.

It can be written as a sum of positive squares in 2 ways, for example, as 59536 + 338724 = 244^2 + 582^2 .

It is a super-2 number, since 2×3982602 = 317222055200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398261) 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, 9937 + ... + 9976.

It is an arithmetic number, because the mean of its divisors is an integer number (69699).

2398260 is an apocalyptic number.

It is an amenable number.

398260 is an abundant number, since it is smaller than the sum of its proper divisors (438128).

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

398260 is a wasteful number, since it uses less digits than its factorization.

398260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19922 (or 19920 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 398260 is about 631.0784420340. The cubic root of 398260 is about 73.5736377704.

The spelling of 398260 in words is "three hundred ninety-eight thousand, two hundred sixty".

Divisors: 1 2 4 5 10 20 19913 39826 79652 99565 199130 398260