28840022 has 12 divisors (see below), whose sum is σ = 45224340. Its totient is φ = 13792548.

The previous prime is 28840001. The next prime is 28840027. The reversal of 28840022 is 22004882.

It is a junction number, because it is equal to n+sod(n) for n = 28839973 and 28840000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12572 + ... + 14687.

It is an arithmetic number, because the mean of its divisors is an integer number (3768695).

Almost surely, 2^28840022 is an apocalyptic number.

28840022 is a deficient number, since it is larger than the sum of its proper divisors (16384318).

28840022 is a wasteful number, since it uses less digits than its factorization.

28840022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27307 (or 27284 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 28840022 is about 5370.2906811457. The cubic root of 28840022 is about 306.6656944414.

The spelling of 28840022 in words is "twenty-eight million, eight hundred forty thousand, twenty-two".