30111900 has 144 divisors (see below), whose sum is σ = 107326464. Its totient is φ = 6347520.

The previous prime is 30111871. The next prime is 30111923. The reversal of 30111900 is 911103.

It is a super-2 number, since 2×30111900² = 1813453043220000, which contains 22 as substring.

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 30111900.

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, 26749 + ... + 27851.

Almost surely, 2^30111900 is an apocalyptic number.

30111900 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 30111900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53663232).

30111900 is an abundant number, since it is smaller than the sum of its proper divisors (77214564).

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

30111900 is a wasteful number, since it uses less digits than its factorization.

30111900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 30111900 is about 5487.4310929614. The cubic root of 30111900 is about 311.1091038230.

The spelling of 30111900 in words is "thirty million, one hundred eleven thousand, nine hundred".