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381864 = 23372273
BaseRepresentation
bin1011101001110101000
3201101211010
41131032220
544204424
612103520
73150210
oct1351650
9641733
10381864
1124099a
12164ba0
13104a72
149d240
1578229
hex5d3a8

381864 has 32 divisors (see below), whose sum is σ = 1091520. Its totient is φ = 109056.

The previous prime is 381859. The next prime is 381911. The reversal of 381864 is 468183.

It is a happy number.

It is a super-2 number, since 2×3818642 = 291640228992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381864.

It is an unprimeable number.

381864 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (34110).

2381864 is an apocalyptic number.

It is an amenable number.

381864 is an abundant number, since it is smaller than the sum of its proper divisors (709656).

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

381864 is a wasteful number, since it uses less digits than its factorization.

381864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289 (or 2285 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 381864 is about 617.9514544040. The cubic root of 381864 is about 72.5498032753.

The spelling of 381864 in words is "three hundred eighty-one thousand, eight hundred sixty-four".

Divisors: 1 2 3 4 6 7 8 12 14 21 24 28 42 56 84 168 2273 4546 6819 9092 13638 15911 18184 27276 31822 47733 54552 63644 95466 127288 190932 381864