30128465 has 4 divisors (see below), whose sum is σ = 36154164. Its totient is φ = 24102768.

The previous prime is 30128453. The next prime is 30128473. The reversal of 30128465 is 56482103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13424896 + 16703569 = 3664^2 + 4087^2 .

It is a cyclic number.

It is not a de Polignac number, because 30128465 - 2⁸ = 30128209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3012842 + ... + 3012851.

It is an arithmetic number, because the mean of its divisors is an integer number (9038541).

Almost surely, 2^30128465 is an apocalyptic number.

It is an amenable number.

30128465 is a deficient number, since it is larger than the sum of its proper divisors (6025699).

30128465 is an equidigital number, since it uses as much as digits as its factorization.

30128465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025698.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30128465 is about 5488.9402437993. The cubic root of 30128465 is about 311.1661419329.

The spelling of 30128465 in words is "thirty million, one hundred twenty-eight thousand, four hundred sixty-five".