28914551 has 2 divisors, whose sum is σ = 28914552. Its totient is φ = 28914550.

The previous prime is 28914517. The next prime is 28914559. The reversal of 28914551 is 15541982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28914551 - 2¹⁰ = 28913527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28914559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457275 + 14457276.

It is an arithmetic number, because the mean of its divisors is an integer number (14457276).

Almost surely, 2^28914551 is an apocalyptic number.

28914551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28914551 is an equidigital number, since it uses as much as digits as its factorization.

28914551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 35.

The square root of 28914551 is about 5377.2252138068. The cubic root of 28914551 is about 306.9296312243.

The spelling of 28914551 in words is "twenty-eight million, nine hundred fourteen thousand, five hundred fifty-one".