30123420 has 24 divisors (see below), whose sum is σ = 84345744. Its totient is φ = 8032896.

The previous prime is 30123409. The next prime is 30123437. The reversal of 30123420 is 2432103.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30123420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250969 + ... + 251088.

It is an arithmetic number, because the mean of its divisors is an integer number (3514406).

Almost surely, 2^30123420 is an apocalyptic number.

30123420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30123420 is an abundant number, since it is smaller than the sum of its proper divisors (54222324).

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

30123420 is a wasteful number, since it uses less digits than its factorization.

30123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502069 (or 502067 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30123420 is about 5488.4806640818. The cubic root of 30123420 is about 311.1487727460.

Adding to 30123420 its reverse (2432103), we get a palindrome (32555523).

The spelling of 30123420 in words is "thirty million, one hundred twenty-three thousand, four hundred twenty".