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30102 = 2329173

30102 has 16 divisors (see below), whose sum is σ = 62640. Its totient is φ = 9632.

The previous prime is 30097. The next prime is 30103. The reversal of 30102 is 20103.

It is a super-2 number, since 2×301022 = 1812260808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30103) by changing a digit.

30102 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, 88 + ... + 260.

It is an arithmetic number, because the mean of its divisors is an integer number (3915).

230102 is an apocalyptic number.

It is a pronic number, being equal to 173×174.

30102 is an abundant number, since it is smaller than the sum of its proper divisors (32538).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31320).

30102 is a wasteful number, since it uses less digits than its factorization.

30102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 30102 is about 173.4992795374. The cubic root of 30102 is about 31.1075005258.

Adding to 30102 its reverse (20103), we get a palindrome (50205).

Subtracting from 30102 its reverse (20103), we obtain a palindrome (9999).

The spelling of 30102 in words is "thirty thousand, one hundred two".

Divisors: 1 2 3 6 29 58 87 173 174 346 519 1038 5017 10034 15051 30102