28029644 has 6 divisors (see below), whose sum is σ = 49051884. Its totient is φ = 14014820.

The previous prime is 28029641. The next prime is 28029647. The reversal of 28029644 is 44692082.

It is an interprime number because it is at equal distance from previous prime (28029641) and next prime (28029647).

It is not an unprimeable number, because it can be changed into a prime (28029641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3503702 + ... + 3503709.

It is an arithmetic number, because the mean of its divisors is an integer number (8175314).

Almost surely, 2^28029644 is an apocalyptic number.

It is an amenable number.

28029644 is a deficient number, since it is larger than the sum of its proper divisors (21022240).

28029644 is a wasteful number, since it uses less digits than its factorization.

28029644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007415 (or 7007413 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28029644 is about 5294.3029758411. The cubic root of 28029644 is about 303.7660220624.

The spelling of 28029644 in words is "twenty-eight million, twenty-nine thousand, six hundred forty-four".