28234644 has 12 divisors (see below), whose sum is σ = 65880864. Its totient is φ = 9411544.

The previous prime is 28234601. The next prime is 28234649. The reversal of 28234644 is 44643282.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28234649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176432 + ... + 1176455.

It is an arithmetic number, because the mean of its divisors is an integer number (5490072).

Almost surely, 2^28234644 is an apocalyptic number.

It is an amenable number.

28234644 is an abundant number, since it is smaller than the sum of its proper divisors (37646220).

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

28234644 is a wasteful number, since it uses less digits than its factorization.

28234644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352894 (or 2352892 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

The square root of 28234644 is about 5313.6281390402. The cubic root of 28234644 is about 304.5047736936.

The spelling of 28234644 in words is "twenty-eight million, two hundred thirty-four thousand, six hundred forty-four".