30140128 has 12 divisors (see below), whose sum is σ = 59338440. Its totient is φ = 15070048.

The previous prime is 30140101. The next prime is 30140129. The reversal of 30140128 is 82104103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30140129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470908 + ... + 470971.

It is an arithmetic number, because the mean of its divisors is an integer number (4944870).

Almost surely, 2^30140128 is an apocalyptic number.

It is an amenable number.

30140128 is a deficient number, since it is larger than the sum of its proper divisors (29198312).

30140128 is an equidigital number, since it uses as much as digits as its factorization.

30140128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941889 (or 941881 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 30140128 is about 5490.0025500905. The cubic root of 30140128 is about 311.2062884912.

The spelling of 30140128 in words is "thirty million, one hundred forty thousand, one hundred twenty-eight".