28027769 has 16 divisors (see below), whose sum is σ = 35112960. Its totient is φ = 21734160.

The previous prime is 28027739. The next prime is 28027771. The reversal of 28027769 is 96772082.

It is not a de Polignac number, because 28027769 - 2¹² = 28023673 is a prime.

It is a super-2 number, since 2×28027769² = 1571111670234722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28027709) 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, 17642 + ... + 19164.

It is an arithmetic number, because the mean of its divisors is an integer number (2194560).

Almost surely, 2^28027769 is an apocalyptic number.

It is an amenable number.

28027769 is a deficient number, since it is larger than the sum of its proper divisors (7085191).

28027769 is a wasteful number, since it uses less digits than its factorization.

28027769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 28027769 is about 5294.1258957452. The cubic root of 28027769 is about 303.7592485908.

The spelling of 28027769 in words is "twenty-eight million, twenty-seven thousand, seven hundred sixty-nine".