28849665 has 32 divisors (see below), whose sum is σ = 50029056. Its totient is φ = 14112000.

The previous prime is 28849591. The next prime is 28849669. The reversal of 28849665 is 56694882.

It is a happy number.

It is not a de Polignac number, because 28849665 - 2⁷ = 28849537 is a prime.

It is a super-2 number, since 2×28849665² = 1664606341224450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28849669) 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, 38040 + ... + 38790.

It is an arithmetic number, because the mean of its divisors is an integer number (1563408).

Almost surely, 2^28849665 is an apocalyptic number.

It is an amenable number.

28849665 is a deficient number, since it is larger than the sum of its proper divisors (21179391).

28849665 is a wasteful number, since it uses less digits than its factorization.

28849665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its digits is 829440, while the sum is 48.

The square root of 28849665 is about 5371.1884159839. The cubic root of 28849665 is about 306.6998697246.

The spelling of 28849665 in words is "twenty-eight million, eight hundred forty-nine thousand, six hundred sixty-five".