28136149 has 2 divisors, whose sum is σ = 28136150. Its totient is φ = 28136148.

The previous prime is 28136137. The next prime is 28136179. The reversal of 28136149 is 94163182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 4028049 = 4910^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 28136149 - 2¹¹ = 28134101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28136179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14068074 + 14068075.

It is an arithmetic number, because the mean of its divisors is an integer number (14068075).

Almost surely, 2^28136149 is an apocalyptic number.

It is an amenable number.

28136149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28136149 is an equidigital number, since it uses as much as digits as its factorization.

28136149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 28136149 is about 5304.3518925501. The cubic root of 28136149 is about 304.1502784523.

The spelling of 28136149 in words is "twenty-eight million, one hundred thirty-six thousand, one hundred forty-nine".