30120426 has 48 divisors (see below), whose sum is σ = 74939904. Its totient is φ = 8564832.

The previous prime is 30120383. The next prime is 30120427. The reversal of 30120426 is 62402103.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30120399 and 30120408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34471 + ... + 35333.

It is an arithmetic number, because the mean of its divisors is an integer number (1561248).

Almost surely, 2^30120426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30120426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37469952).

30120426 is an abundant number, since it is smaller than the sum of its proper divisors (44819478).

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

30120426 is a wasteful number, since it uses less digits than its factorization.

30120426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30120426 is about 5488.2079042252. The cubic root of 30120426 is about 311.1384639311.

Adding to 30120426 its reverse (62402103), we get a palindrome (92522529).

The spelling of 30120426 in words is "thirty million, one hundred twenty thousand, four hundred twenty-six".