28370522 has 4 divisors (see below), whose sum is σ = 42555786. Its totient is φ = 14185260.

The previous prime is 28370521. The next prime is 28370533. The reversal of 28370522 is 22507382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22507382 = 2 ⋅11253691.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 502681 = 5279^2 + 709^2 .

It is not an unprimeable number, because it can be changed into a prime (28370521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7092629 + ... + 7092632.

Almost surely, 2^28370522 is an apocalyptic number.

28370522 is a deficient number, since it is larger than the sum of its proper divisors (14185264).

28370522 is a wasteful number, since it uses less digits than its factorization.

28370522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14185263.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 28370522 is about 5326.3985956742. The cubic root of 28370522 is about 304.9924642051.

The spelling of 28370522 in words is "twenty-eight million, three hundred seventy thousand, five hundred twenty-two".