28581953 has 2 divisors, whose sum is σ = 28581954. Its totient is φ = 28581952.

The previous prime is 28581941. The next prime is 28581983. The reversal of 28581953 is 35918582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20584369 + 7997584 = 4537^2 + 2828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28581953 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 28581953.

It is not a weakly prime, because it can be changed into another prime (28581983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14290976 + 14290977.

It is an arithmetic number, because the mean of its divisors is an integer number (14290977).

Almost surely, 2^28581953 is an apocalyptic number.

It is an amenable number.

28581953 is a deficient number, since it is larger than the sum of its proper divisors (1).

28581953 is an equidigital number, since it uses as much as digits as its factorization.

28581953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 28581953 is about 5346.2092177542. The cubic root of 28581953 is about 305.7482408143.

The spelling of 28581953 in words is "twenty-eight million, five hundred eighty-one thousand, nine hundred fifty-three".