28571235 has 64 divisors (see below), whose sum is σ = 59028480. Its totient is φ = 11450880.

The previous prime is 28571227. The next prime is 28571239. The reversal of 28571235 is 53217582.

It is not a de Polignac number, because 28571235 - 2³ = 28571227 is a prime.

It is a super-3 number, since 3×28571235³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 28571196 and 28571205.

It is not an unprimeable number, because it can be changed into a prime (28571239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33069 + ... + 33921.

It is an arithmetic number, because the mean of its divisors is an integer number (922320).

Almost surely, 2^28571235 is an apocalyptic number.

28571235 is an abundant number, since it is smaller than the sum of its proper divisors (30457245).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28571235 is a wasteful number, since it uses less digits than its factorization.

28571235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its digits is 16800, while the sum is 33.

The square root of 28571235 is about 5345.2067312687. The cubic root of 28571235 is about 305.7100183346.

The spelling of 28571235 in words is "twenty-eight million, five hundred seventy-one thousand, two hundred thirty-five".