28135901 has 8 divisors (see below), whose sum is σ = 29841984. Its totient is φ = 26435520.

The previous prime is 28135897. The next prime is 28135927. The reversal of 28135901 is 10953182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28135901 - 2² = 28135897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12986 + ... + 14996.

It is an arithmetic number, because the mean of its divisors is an integer number (3730248).

Almost surely, 2^28135901 is an apocalyptic number.

It is an amenable number.

28135901 is a deficient number, since it is larger than the sum of its proper divisors (1706083).

28135901 is a wasteful number, since it uses less digits than its factorization.

28135901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 28135901 is about 5304.3285154673. The cubic root of 28135901 is about 304.1493848274.

The spelling of 28135901 in words is "twenty-eight million, one hundred thirty-five thousand, nine hundred one".