30120156 has 72 divisors (see below), whose sum is σ = 86696064. Its totient is φ = 8727840.

The previous prime is 30120137. The next prime is 30120161. The reversal of 30120156 is 65102103.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7455 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (1204112).

Almost surely, 2^30120156 is an apocalyptic number.

30120156 is a gapful number since it is divisible by the number (36) 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 30120156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43348032).

30120156 is an abundant number, since it is smaller than the sum of its proper divisors (56575908).

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

30120156 is a wasteful number, since it uses less digits than its factorization.

30120156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 30120156 is about 5488.1833059766. The cubic root of 30120156 is about 311.1375342448.

Adding to 30120156 its reverse (65102103), we get a palindrome (95222259).

It can be divided in two parts, 30120 and 156, that added together give a square (30276 = 174²).

The spelling of 30120156 in words is "thirty million, one hundred twenty thousand, one hundred fifty-six".