28148131 has 8 divisors (see below), whose sum is σ = 30758400. Its totient is φ = 25546440.

The previous prime is 28148129. The next prime is 28148137. The reversal of 28148131 is 13184182.

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 28148131 - 2¹ = 28148129 is a prime.

It is a super-2 number, since 2×28148131² = 1584634557586322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28148131.

It is not an unprimeable number, because it can be changed into a prime (28148137) 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, 6130 + ... + 9688.

It is an arithmetic number, because the mean of its divisors is an integer number (3844800).

Almost surely, 2^28148131 is an apocalyptic number.

28148131 is a deficient number, since it is larger than the sum of its proper divisors (2610269).

28148131 is a wasteful number, since it uses less digits than its factorization.

28148131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289.

The product of its digits is 1536, while the sum is 28.

The square root of 28148131 is about 5305.4812222832. The cubic root of 28148131 is about 304.1934472532.

The spelling of 28148131 in words is "twenty-eight million, one hundred forty-eight thousand, one hundred thirty-one".