30128642 has 16 divisors (see below), whose sum is σ = 47856960. Its totient is φ = 14185872.

The previous prime is 30128617. The next prime is 30128653. The reversal of 30128642 is 24682103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4283 + ... + 8865.

It is an arithmetic number, because the mean of its divisors is an integer number (2991060).

Almost surely, 2^30128642 is an apocalyptic number.

30128642 is a deficient number, since it is larger than the sum of its proper divisors (17728318).

30128642 is a wasteful number, since it uses less digits than its factorization.

30128642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 30128642 is about 5488.9563671066. The cubic root of 30128642 is about 311.1667512825.

The spelling of 30128642 in words is "thirty million, one hundred twenty-eight thousand, six hundred forty-two".