30128701 has 4 divisors (see below), whose sum is σ = 30140092. Its totient is φ = 30117312.

The previous prime is 30128677. The next prime is 30128711. The reversal of 30128701 is 10782103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26522500 + 3606201 = 5150^2 + 1899^2 .

It is a cyclic number.

It is not a de Polignac number, because 30128701 - 2⁵ = 30128669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30128711) 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, 571 + ... + 7783.

It is an arithmetic number, because the mean of its divisors is an integer number (7535023).

Almost surely, 2^30128701 is an apocalyptic number.

It is an amenable number.

30128701 is a deficient number, since it is larger than the sum of its proper divisors (11391).

30128701 is an equidigital number, since it uses as much as digits as its factorization.

30128701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11390.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 30128701 is about 5488.9617415318. The cubic root of 30128701 is about 311.1669543985.

The spelling of 30128701 in words is "thirty million, one hundred twenty-eight thousand, seven hundred one".