28426481 has 2 divisors, whose sum is σ = 28426482. Its totient is φ = 28426480.

The previous prime is 28426477. The next prime is 28426487. The reversal of 28426481 is 18462482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17430625 + 10995856 = 4175^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 28426481 - 2² = 28426477 is a prime.

It is a super-2 number, since 2×28426481² = 1616129644086722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28426487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14213240 + 14213241.

It is an arithmetic number, because the mean of its divisors is an integer number (14213241).

Almost surely, 2^28426481 is an apocalyptic number.

It is an amenable number.

28426481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28426481 is an equidigital number, since it uses as much as digits as its factorization.

28426481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 35.

The square root of 28426481 is about 5331.6489944482. The cubic root of 28426481 is about 305.1928584072.

The spelling of 28426481 in words is "twenty-eight million, four hundred twenty-six thousand, four hundred eighty-one".