28001127 has 32 divisors (see below), whose sum is σ = 47646720. Its totient is φ = 14202720.

The previous prime is 28001093. The next prime is 28001137. The reversal of 28001127 is 72110082.

It is not a de Polignac number, because 28001127 - 2⁶ = 28001063 is a prime.

It is a super-2 number, since 2×28001127² = 1568126226540258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8524 + ... + 11342.

It is an arithmetic number, because the mean of its divisors is an integer number (1488960).

Almost surely, 2^28001127 is an apocalyptic number.

28001127 is a deficient number, since it is larger than the sum of its proper divisors (19645593).

28001127 is a wasteful number, since it uses less digits than its factorization.

28001127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 28001127 is about 5291.6091125479. The cubic root of 28001127 is about 303.6629712231.

The spelling of 28001127 in words is "twenty-eight million, one thousand, one hundred twenty-seven".