28092890 has 32 divisors (see below), whose sum is σ = 60307200. Its totient is φ = 9212544.

The previous prime is 28092877. The next prime is 28092893. The reversal of 28092890 is 9829082.

It is not an unprimeable number, because it can be changed into a prime (28092893) 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, 7115 + ... + 10334.

It is an arithmetic number, because the mean of its divisors is an integer number (1884600).

Almost surely, 2^28092890 is an apocalyptic number.

28092890 is an abundant number, since it is smaller than the sum of its proper divisors (32214310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28092890 is a wasteful number, since it uses less digits than its factorization.

28092890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17486.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 28092890 is about 5300.2726344972. The cubic root of 28092890 is about 303.9943226664.

It can be divided in two parts, 28092 and 890, that added together give a palindrome (28982).

The spelling of 28092890 in words is "twenty-eight million, ninety-two thousand, eight hundred ninety".