30490128 has 80 divisors (see below), whose sum is σ = 88258240. Its totient is φ = 10077696.

The previous prime is 30490091. The next prime is 30490151. The reversal of 30490128 is 82109403.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 70200 + ... + 70632.

It is an arithmetic number, because the mean of its divisors is an integer number (1103228).

Almost surely, 2^30490128 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 30490128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44129120).

30490128 is an abundant number, since it is smaller than the sum of its proper divisors (57768112).

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

30490128 is a wasteful number, since it uses less digits than its factorization.

30490128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 601 counting only the distinct ones).

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

The square root of 30490128 is about 5521.7866673750. The cubic root of 30490128 is about 312.4062754664.

The spelling of 30490128 in words is "thirty million, four hundred ninety thousand, one hundred twenty-eight".