28669351 has 2 divisors, whose sum is σ = 28669352. Its totient is φ = 28669350.

The previous prime is 28669331. The next prime is 28669357. The reversal of 28669351 is 15396682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28669351 is a prime.

It is a super-2 number, since 2×28669351² = 1643863373522402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28669357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334675 + 14334676.

It is an arithmetic number, because the mean of its divisors is an integer number (14334676).

Almost surely, 2^28669351 is an apocalyptic number.

28669351 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669351 is an equidigital number, since it uses as much as digits as its factorization.

28669351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 28669351 is about 5354.3768078087. The cubic root of 28669351 is about 306.0595630703.

The spelling of 28669351 in words is "twenty-eight million, six hundred sixty-nine thousand, three hundred fifty-one".