30140928 has 120 divisors (see below), whose sum is σ = 90220416. Its totient is φ = 9676800.

The previous prime is 30140911. The next prime is 30140933. The reversal of 30140928 is 82904103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142743 + ... + 142953.

Almost surely, 2^30140928 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 30140928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45110208).

30140928 is an abundant number, since it is smaller than the sum of its proper divisors (60079488).

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

30140928 is a wasteful number, since it uses less digits than its factorization.

30140928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30140928 is about 5490.0754093182. The cubic root of 30140928 is about 311.2090418839.

The spelling of 30140928 in words is "thirty million, one hundred forty thousand, nine hundred twenty-eight".