30423120 has 240 divisors, whose sum is σ = 118742400. Its totient is φ = 6386688.

The previous prime is 30423109. The next prime is 30423131. The reversal of 30423120 is 2132403.

It is an interprime number because it is at equal distance from previous prime (30423109) and next prime (30423131).

It is a tau number, because it is divible by the number of its divisors (240).

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 30423120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152781 + ... + 152979.

It is an arithmetic number, because the mean of its divisors is an integer number (494760).

Almost surely, 2^30423120 is an apocalyptic number.

30423120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30423120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59371200).

30423120 is an abundant number, since it is smaller than the sum of its proper divisors (88319280).

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

30423120 is a wasteful number, since it uses less digits than its factorization.

30423120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 229 counting only the distinct ones).

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

The square root of 30423120 is about 5515.7157287155. The cubic root of 30423120 is about 312.1772497113.

Adding to 30423120 its reverse (2132403), we get a palindrome (32555523).

The spelling of 30423120 in words is "thirty million, four hundred twenty-three thousand, one hundred twenty".