28497629 has 2 divisors, whose sum is σ = 28497630. Its totient is φ = 28497628.

The previous prime is 28497619. The next prime is 28497647. The reversal of 28497629 is 92679482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 8265625 = 4498^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 28497629 - 2⁴ = 28497613 is a prime.

It is a super-2 number, since 2×28497629² = 1624229717243282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28497619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14248814 + 14248815.

It is an arithmetic number, because the mean of its divisors is an integer number (14248815).

Almost surely, 2^28497629 is an apocalyptic number.

It is an amenable number.

28497629 is a deficient number, since it is larger than the sum of its proper divisors (1).

28497629 is an equidigital number, since it uses as much as digits as its factorization.

28497629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 28497629 is about 5338.3170569010. The cubic root of 28497629 is about 305.4472663883.

The spelling of 28497629 in words is "twenty-eight million, four hundred ninety-seven thousand, six hundred twenty-nine".