28893381 has 16 divisors (see below), whose sum is σ = 42562560. Its totient is φ = 17287920.

The previous prime is 28893349. The next prime is 28893413. The reversal of 28893381 is 18339882.

It is an interprime number because it is at equal distance from previous prime (28893349) and next prime (28893413).

It is not a de Polignac number, because 28893381 - 2⁵ = 28893349 is a prime.

It is a super-2 number, since 2×28893381² = 1669654931222322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28893331) 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, 2935 + ... + 8148.

It is an arithmetic number, because the mean of its divisors is an integer number (2660160).

Almost surely, 2^28893381 is an apocalyptic number.

It is an amenable number.

28893381 is a deficient number, since it is larger than the sum of its proper divisors (13669179).

28893381 is a wasteful number, since it uses less digits than its factorization.

28893381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11176.

The product of its digits is 82944, while the sum is 42.

The square root of 28893381 is about 5375.2563659792. The cubic root of 28893381 is about 306.8547060108.

The spelling of 28893381 in words is "twenty-eight million, eight hundred ninety-three thousand, three hundred eighty-one".