30120000 has 140 divisors (see below), whose sum is σ = 99980496. Its totient is φ = 8000000.

The previous prime is 30119989. The next prime is 30120011. The reversal of 30120000 is 2103.

It is an interprime number because it is at equal distance from previous prime (30119989) and next prime (30120011).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119875 + ... + 120125.

Almost surely, 2^30120000 is an apocalyptic number.

30120000 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 30120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49990248).

30120000 is an abundant number, since it is smaller than the sum of its proper divisors (69860496).

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

30120000 is an equidigital number, since it uses as much as digits as its factorization.

30120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 30120000 is about 5488.1690936049. The cubic root of 30120000 is about 311.1369970902.

Adding to 30120000 its reverse (2103), we get a palindrome (30122103).

It can be divided in two parts, 301 and 20000, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 30120000 in words is "thirty million, one hundred twenty thousand".