28130061 has 8 divisors (see below), whose sum is σ = 37664640. Its totient is φ = 18674432.

The previous prime is 28130033. The next prime is 28130093. The reversal of 28130061 is 16003182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28130061 - 2²² = 23935757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28132061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18900 + ... + 20333.

It is an arithmetic number, because the mean of its divisors is an integer number (4708080).

Almost surely, 2^28130061 is an apocalyptic number.

It is an amenable number.

28130061 is a deficient number, since it is larger than the sum of its proper divisors (9534579).

28130061 is a wasteful number, since it uses less digits than its factorization.

28130061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39475.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 28130061 is about 5303.7779930913. Note that the first 3 decimals coincide. The cubic root of 28130061 is about 304.1283398842.

The spelling of 28130061 in words is "twenty-eight million, one hundred thirty thousand, sixty-one".