28951277 has 2 divisors, whose sum is σ = 28951278. Its totient is φ = 28951276.

The previous prime is 28951267. The next prime is 28951291. The reversal of 28951277 is 77215982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27573001 + 1378276 = 5251^2 + 1174^2 .

It is a cyclic number.

It is not a de Polignac number, because 28951277 - 2¹² = 28947181 is a prime.

It is equal to p_1796846 and since 28951277 and 1796846 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28951217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14475638 + 14475639.

It is an arithmetic number, because the mean of its divisors is an integer number (14475639).

Almost surely, 2^28951277 is an apocalyptic number.

It is an amenable number.

28951277 is a deficient number, since it is larger than the sum of its proper divisors (1).

28951277 is an equidigital number, since it uses as much as digits as its factorization.

28951277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 41.

The square root of 28951277 is about 5380.6390884355. The cubic root of 28951277 is about 307.0595257824.

The spelling of 28951277 in words is "twenty-eight million, nine hundred fifty-one thousand, two hundred seventy-seven".