28066115 has 32 divisors (see below), whose sum is σ = 42301440. Its totient is φ = 17366400.

The previous prime is 28066109. The next prime is 28066121. The reversal of 28066115 is 51166082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28066109) and next prime (28066121).

It is not a de Polignac number, because 28066115 - 2²² = 23871811 is a prime.

It is a super-2 number, since 2×28066115² = 1575413622386450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103430 + ... + 103700.

It is an arithmetic number, because the mean of its divisors is an integer number (1321920).

Almost surely, 2^28066115 is an apocalyptic number.

28066115 is a deficient number, since it is larger than the sum of its proper divisors (14235325).

28066115 is a wasteful number, since it uses less digits than its factorization.

28066115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28066115 is about 5297.7462189123. The cubic root of 28066115 is about 303.8977141742.

The spelling of 28066115 in words is "twenty-eight million, sixty-six thousand, one hundred fifteen".