28523477 has 2 divisors, whose sum is σ = 28523478. Its totient is φ = 28523476.

The previous prime is 28523461. The next prime is 28523507. The reversal of 28523477 is 77432582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 9084196 = 4409^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 28523477 - 2⁴ = 28523461 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28523477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28523177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14261738 + 14261739.

It is an arithmetic number, because the mean of its divisors is an integer number (14261739).

Almost surely, 2^28523477 is an apocalyptic number.

It is an amenable number.

28523477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28523477 is an equidigital number, since it uses as much as digits as its factorization.

28523477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The square root of 28523477 is about 5340.7374958895. The cubic root of 28523477 is about 305.5395876957.

The spelling of 28523477 in words is "twenty-eight million, five hundred twenty-three thousand, four hundred seventy-seven".