30087128 has 16 divisors (see below), whose sum is σ = 58866480. Its totient is φ = 14389408.

The previous prime is 30087121. The next prime is 30087131. The reversal of 30087128 is 82178003.

It is a self number, because there is not a number n which added to its sum of digits gives 30087128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30087121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81575 + ... + 81942.

It is an arithmetic number, because the mean of its divisors is an integer number (3679155).

Almost surely, 2^30087128 is an apocalyptic number.

It is an amenable number.

30087128 is a deficient number, since it is larger than the sum of its proper divisors (28779352).

30087128 is a wasteful number, since it uses less digits than its factorization.

30087128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163546 (or 163542 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 30087128 is about 5485.1734703654. The cubic root of 30087128 is about 311.0237675821.

The spelling of 30087128 in words is "thirty million, eighty-seven thousand, one hundred twenty-eight".