30909144 has 64 divisors (see below), whose sum is σ = 88784640. Its totient is φ = 8784000.

The previous prime is 30909119. The next prime is 30909161. The reversal of 30909144 is 44190903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41802 + ... + 42534.

It is an arithmetic number, because the mean of its divisors is an integer number (1387260).

Almost surely, 2^30909144 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 30909144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44392320).

30909144 is an abundant number, since it is smaller than the sum of its proper divisors (57875496).

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

30909144 is a wasteful number, since it uses less digits than its factorization.

30909144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 30909144 is about 5559.5992661342. The cubic root of 30909144 is about 313.8308689285.

The spelling of 30909144 in words is "thirty million, nine hundred nine thousand, one hundred forty-four".