28083961 has 2 divisors, whose sum is σ = 28083962. Its totient is φ = 28083960.

The previous prime is 28083953. The next prime is 28084013. The reversal of 28083961 is 16938082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 9859600 = 4269^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 28083961 - 2³ = 28083953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28083961.

It is not a weakly prime, because it can be changed into another prime (28083931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14041980 + 14041981.

It is an arithmetic number, because the mean of its divisors is an integer number (14041981).

Almost surely, 2^28083961 is an apocalyptic number.

It is an amenable number.

28083961 is a deficient number, since it is larger than the sum of its proper divisors (1).

28083961 is an equidigital number, since it uses as much as digits as its factorization.

28083961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28083961 is about 5299.4302523951. The cubic root of 28083961 is about 303.9621122277.

It can be divided in two parts, 280839 and 61, that added together give a square (280900 = 530²).

The spelling of 28083961 in words is "twenty-eight million, eighty-three thousand, nine hundred sixty-one".