28622975 has 6 divisors (see below), whose sum is σ = 35492520. Its totient is φ = 22898360.

The previous prime is 28622947. The next prime is 28622981. The reversal of 28622975 is 57922682.

It is not a de Polignac number, because 28622975 - 2¹⁶ = 28557439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572435 + ... + 572484.

It is an arithmetic number, because the mean of its divisors is an integer number (5915420).

Almost surely, 2^28622975 is an apocalyptic number.

28622975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28622975 is a deficient number, since it is larger than the sum of its proper divisors (6869545).

28622975 is a wasteful number, since it uses less digits than its factorization.

28622975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144929 (or 1144924 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 28622975 is about 5350.0443923392. The cubic root of 28622975 is about 305.8944450602.

The spelling of 28622975 in words is "twenty-eight million, six hundred twenty-two thousand, nine hundred seventy-five".