28962181 has 2 divisors, whose sum is σ = 28962182. Its totient is φ = 28962180.

The previous prime is 28962161. The next prime is 28962187. The reversal of 28962181 is 18126982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 8031556 = 4575^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 28962181 - 2¹¹ = 28960133 is a prime.

It is a super-2 number, since 2×28962181² = 1677615856553522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28962181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28962187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14481090 + 14481091.

It is an arithmetic number, because the mean of its divisors is an integer number (14481091).

Almost surely, 2^28962181 is an apocalyptic number.

It is an amenable number.

28962181 is a deficient number, since it is larger than the sum of its proper divisors (1).

28962181 is an equidigital number, since it uses as much as digits as its factorization.

28962181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 28962181 is about 5381.6522555810. The cubic root of 28962181 is about 307.0980705049.

The spelling of 28962181 in words is "twenty-eight million, nine hundred sixty-two thousand, one hundred eighty-one".