28285701 has 16 divisors (see below), whose sum is σ = 39927360. Its totient is φ = 17781120.

The previous prime is 28285679. The next prime is 28285703. The reversal of 28285701 is 10758282.

It is not a de Polignac number, because 28285701 - 2¹⁰ = 28284677 is a prime.

It is a super-2 number, since 2×28285701² = 1600161762122802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40 + ... + 7521.

It is an arithmetic number, because the mean of its divisors is an integer number (2495460).

Almost surely, 2^28285701 is an apocalyptic number.

It is an amenable number.

28285701 is a deficient number, since it is larger than the sum of its proper divisors (11641659).

28285701 is a wasteful number, since it uses less digits than its factorization.

28285701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28285701 is about 5318.4303135418. The cubic root of 28285701 is about 304.6882095500.

The spelling of 28285701 in words is "twenty-eight million, two hundred eighty-five thousand, seven hundred one".