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138378 = 2323063
BaseRepresentation
bin100001110010001010
321000211010
4201302022
513412003
62544350
71114302
oct416212
9230733
10138378
1194a69
12680b6
134aca6
1438602
152b003
hex21c8a

138378 has 8 divisors (see below), whose sum is σ = 276768. Its totient is φ = 46124.

The previous prime is 138373. The next prime is 138389. The reversal of 138378 is 873831.

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

138378 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11526 + ... + 11537.

It is an arithmetic number, because the mean of its divisors is an integer number (34596).

2138378 is an apocalyptic number.

138378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138378 is a wasteful number, since it uses less digits than its factorization.

138378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23068.

The product of its digits is 4032, while the sum is 30.

The square root of 138378 is about 371.9919353965. The cubic root of 138378 is about 51.7236323935.

The spelling of 138378 in words is "one hundred thirty-eight thousand, three hundred seventy-eight".

Divisors: 1 2 3 6 23063 46126 69189 138378