30420084 has 12 divisors (see below), whose sum is σ = 70980224. Its totient is φ = 10140024.

The previous prime is 30420067. The next prime is 30420107. The reversal of 30420084 is 48002403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 30420084.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267492 + ... + 1267515.

Almost surely, 2^30420084 is an apocalyptic number.

It is an amenable number.

30420084 is an abundant number, since it is smaller than the sum of its proper divisors (40560140).

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

30420084 is a wasteful number, since it uses less digits than its factorization.

30420084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535014 (or 2535012 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 30420084 is about 5515.4405082459. The cubic root of 30420084 is about 312.1668650471.

Adding to 30420084 its reverse (48002403), we get a palindrome (78422487).

The spelling of 30420084 in words is "thirty million, four hundred twenty thousand, eighty-four".