28026031 has 4 divisors (see below), whose sum is σ = 30573864. Its totient is φ = 25478200.

The previous prime is 28026017. The next prime is 28026073. The reversal of 28026031 is 13062082.

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

It is not a de Polignac number, because 28026031 - 2⁵ = 28025999 is a prime.

It is a super-2 number, since 2×28026031² = 1570916827225922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28025993 and 28026011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026331) 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, 1273900 + ... + 1273921.

It is an arithmetic number, because the mean of its divisors is an integer number (7643466).

Almost surely, 2^28026031 is an apocalyptic number.

28026031 is a deficient number, since it is larger than the sum of its proper divisors (2547833).

28026031 is a wasteful number, since it uses less digits than its factorization.

28026031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547832.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28026031 is about 5293.9617490118. The cubic root of 28026031 is about 303.7529697644.

The spelling of 28026031 in words is "twenty-eight million, twenty-six thousand, thirty-one".