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388213 = 7311789
BaseRepresentation
bin1011110110001110101
3201201112021
41132301311
544410323
612153141
73204550
oct1366165
9651467
10388213
11245741
121687b1
13107917
14a1697
157a05d
hex5ec75

388213 has 8 divisors (see below), whose sum is σ = 458240. Its totient is φ = 321840.

The previous prime is 388211. The next prime is 388231. The reversal of 388213 is 312883.

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

It is a cyclic number.

It is not a de Polignac number, because 388213 - 21 = 388211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388211) 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, 678 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (57280).

2388213 is an apocalyptic number.

It is an amenable number.

388213 is a deficient number, since it is larger than the sum of its proper divisors (70027).

388213 is a wasteful number, since it uses less digits than its factorization.

388213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827.

The product of its digits is 1152, while the sum is 25.

The square root of 388213 is about 623.0674120832. The cubic root of 388213 is about 72.9496744527.

The spelling of 388213 in words is "three hundred eighty-eight thousand, two hundred thirteen".

Divisors: 1 7 31 217 1789 12523 55459 388213