28624669 has 2 divisors, whose sum is σ = 28624670. Its totient is φ = 28624668.

The previous prime is 28624667. The next prime is 28624681. The reversal of 28624669 is 96642682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 1532644 = 5205^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 28624669 - 2¹ = 28624667 is a prime.

It is a super-2 number, since 2×28624669² = 1638743350719122, which contains 22 as substring.

Together with 28624667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28624663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14312334 + 14312335.

It is an arithmetic number, because the mean of its divisors is an integer number (14312335).

Almost surely, 2^28624669 is an apocalyptic number.

It is an amenable number.

28624669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28624669 is an equidigital number, since it uses as much as digits as its factorization.

28624669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 28624669 is about 5350.2027064402. The cubic root of 28624669 is about 305.9004795478.

The spelling of 28624669 in words is "twenty-eight million, six hundred twenty-four thousand, six hundred sixty-nine".