28475537 has 2 divisors, whose sum is σ = 28475538. Its totient is φ = 28475536.

The previous prime is 28475479. The next prime is 28475543. The reversal of 28475537 is 73557482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 9431041 = 4364^2 + 3071^2 .

It is a cyclic number.

It is not a de Polignac number, because 28475537 - 2²⁴ = 11698321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28475494 and 28475503.

It is not a weakly prime, because it can be changed into another prime (28472537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14237768 + 14237769.

It is an arithmetic number, because the mean of its divisors is an integer number (14237769).

Almost surely, 2^28475537 is an apocalyptic number.

It is an amenable number.

28475537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28475537 is an equidigital number, since it uses as much as digits as its factorization.

28475537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 41.

The square root of 28475537 is about 5336.2474642767. The cubic root of 28475537 is about 305.3683161304.

The spelling of 28475537 in words is "twenty-eight million, four hundred seventy-five thousand, five hundred thirty-seven".