32778481 has 2 divisors, whose sum is σ = 32778482. Its totient is φ = 32778480.

The previous prime is 32778463. The next prime is 32778503. The reversal of 32778481 is 18487723.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31360000 + 1418481 = 5600^2 + 1191^2 .

It is an emirp because it is prime and its reverse (18487723) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32778481 - 2⁷ = 32778353 is a prime.

It is a super-2 number, since 2×32778481² = 2148857633334722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32778451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16389240 + 16389241.

It is an arithmetic number, because the mean of its divisors is an integer number (16389241).

Almost surely, 2^32778481 is an apocalyptic number.

It is an amenable number.

32778481 is a deficient number, since it is larger than the sum of its proper divisors (1).

32778481 is an equidigital number, since it uses as much as digits as its factorization.

32778481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 40.

The square root of 32778481 is about 5725.2494268809. The cubic root of 32778481 is about 320.0341142016.

The spelling of 32778481 in words is "thirty-two million, seven hundred seventy-eight thousand, four hundred eighty-one".