30138444 has 72 divisors (see below), whose sum is σ = 89220768. Its totient is φ = 8398080.

The previous prime is 30138413. The next prime is 30138469. The reversal of 30138444 is 44483103.

It is a super-2 number, since 2×30138444² = 1816651613482272, which contains 22 as substring.

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, 8874 + ... + 11790.

Almost surely, 2^30138444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30138444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44610384).

30138444 is an abundant number, since it is smaller than the sum of its proper divisors (59082324).

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

30138444 is a wasteful number, since it uses less digits than its factorization.

30138444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 30138444 is about 5489.8491782562. The cubic root of 30138444 is about 311.2004924402.

The spelling of 30138444 in words is "thirty million, one hundred thirty-eight thousand, four hundred forty-four".