28539031 has 2 divisors, whose sum is σ = 28539032. Its totient is φ = 28539030.

The previous prime is 28539019. The next prime is 28539037. The reversal of 28539031 is 13093582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28539031 - 2⁵ = 28538999 is a prime.

It is a super-2 number, since 2×28539031² = 1628952580837922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28538984 and 28539002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28539037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14269515 + 14269516.

It is an arithmetic number, because the mean of its divisors is an integer number (14269516).

Almost surely, 2^28539031 is an apocalyptic number.

28539031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28539031 is an equidigital number, since it uses as much as digits as its factorization.

28539031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 28539031 is about 5342.1934633632. The cubic root of 28539031 is about 305.5951150446.

The spelling of 28539031 in words is "twenty-eight million, five hundred thirty-nine thousand, thirty-one".