28048031 has 4 divisors (see below), whose sum is σ = 30597864. Its totient is φ = 25498200.

The previous prime is 28048021. The next prime is 28048043. The reversal of 28048031 is 13084082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28048031 - 2¹⁸ = 27785887 is a prime.

It is a super-2 number, since 2×28048031² = 1573384085953922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28048001) 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, 1274900 + ... + 1274921.

It is an arithmetic number, because the mean of its divisors is an integer number (7649466).

Almost surely, 2^28048031 is an apocalyptic number.

28048031 is a deficient number, since it is larger than the sum of its proper divisors (2549833).

28048031 is a wasteful number, since it uses less digits than its factorization.

28048031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549832.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28048031 is about 5296.0391803687. The cubic root of 28048031 is about 303.8324294344.

The spelling of 28048031 in words is "twenty-eight million, forty-eight thousand, thirty-one".