28148961 has 16 divisors (see below), whose sum is σ = 39649280. Its totient is φ = 17735760.

The previous prime is 28148951. The next prime is 28148977. The reversal of 28148961 is 16984182.

It is not a de Polignac number, because 28148961 - 2⁵ = 28148929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28148951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (2478080).

Almost surely, 2^28148961 is an apocalyptic number.

It is an amenable number.

28148961 is a deficient number, since it is larger than the sum of its proper divisors (11500319).

28148961 is a wasteful number, since it uses less digits than its factorization.

28148961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116.

The product of its digits is 27648, while the sum is 39.

The square root of 28148961 is about 5305.5594426978. The cubic root of 28148961 is about 304.1964371270.

The spelling of 28148961 in words is "twenty-eight million, one hundred forty-eight thousand, nine hundred sixty-one".