28629481 has 2 divisors, whose sum is σ = 28629482. Its totient is φ = 28629480.

The previous prime is 28629451. The next prime is 28629499. The reversal of 28629481 is 18492682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26873856 + 1755625 = 5184^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 28629481 - 2²³ = 20240873 is a prime.

It is a super-2 number, since 2×28629481² = 1639294364658722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28629451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14314740 + 14314741.

It is an arithmetic number, because the mean of its divisors is an integer number (14314741).

Almost surely, 2^28629481 is an apocalyptic number.

It is an amenable number.

28629481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28629481 is an equidigital number, since it uses as much as digits as its factorization.

28629481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 28629481 is about 5350.6523901296. The cubic root of 28629481 is about 305.9176198989.

The spelling of 28629481 in words is "twenty-eight million, six hundred twenty-nine thousand, four hundred eighty-one".