28550507 has 2 divisors, whose sum is σ = 28550508. Its totient is φ = 28550506.

The previous prime is 28550503. The next prime is 28550527. The reversal of 28550507 is 70505582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28550507 - 2² = 28550503 is a prime.

It is not a weakly prime, because it can be changed into another prime (28550503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14275253 + 14275254.

It is an arithmetic number, because the mean of its divisors is an integer number (14275254).

Almost surely, 2^28550507 is an apocalyptic number.

28550507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28550507 is an equidigital number, since it uses as much as digits as its factorization.

28550507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 28550507 is about 5343.2674460483. The cubic root of 28550507 is about 305.6360711136.

The spelling of 28550507 in words is "twenty-eight million, five hundred fifty thousand, five hundred seven".