28552523 has 4 divisors (see below), whose sum is σ = 29248968. Its totient is φ = 27856080.

The previous prime is 28552487. The next prime is 28552541. The reversal of 28552523 is 32525582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32525582 = 2 ⋅16262791.

It is a cyclic number.

It is not a de Polignac number, because 28552523 - 2¹⁶ = 28486987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28552523.

It is not an unprimeable number, because it can be changed into a prime (28552543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348161 + ... + 348242.

It is an arithmetic number, because the mean of its divisors is an integer number (7312242).

Almost surely, 2^28552523 is an apocalyptic number.

28552523 is a deficient number, since it is larger than the sum of its proper divisors (696445).

28552523 is an equidigital number, since it uses as much as digits as its factorization.

28552523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696444.

The product of its digits is 24000, while the sum is 32.

The square root of 28552523 is about 5343.4560913326. The cubic root of 28552523 is about 305.6432647724.

The spelling of 28552523 in words is "twenty-eight million, five hundred fifty-two thousand, five hundred twenty-three".