30402 has 16 divisors (see below), whose sum is σ = 67680. Its totient is φ = 10116.

The previous prime is 30391. The next prime is 30403. The reversal of 30402 is 20403.

30402 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (30403) by changing a digit.

30402 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, 228 + ... + 335.

It is an arithmetic number, because the mean of its divisors is an integer number (4230).

2³⁰⁴⁰² is an apocalyptic number.

30402 is an abundant number, since it is smaller than the sum of its proper divisors (37278).

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 (33840).

30402 is a wasteful number, since it uses less digits than its factorization.

30402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 30402 is about 174.3616930406. The cubic root of 30402 is about 31.2104994249.

Adding to 30402 its reverse (20403), we get a palindrome (50805).

Subtracting from 30402 its reverse (20403), we obtain a palindrome (9999).

The spelling of 30402 in words is "thirty thousand, four hundred two".