28925638 has 32 divisors (see below), whose sum is σ = 53625600. Its totient is φ = 11422944.

The previous prime is 28925629. The next prime is 28925639. The reversal of 28925638 is 83652982.

It is a junction number, because it is equal to n+sod(n) for n = 28925594 and 28925603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28925639) 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, 8373 + ... + 11311.

It is an arithmetic number, because the mean of its divisors is an integer number (1675800).

Almost surely, 2^28925638 is an apocalyptic number.

28925638 is a deficient number, since it is larger than the sum of its proper divisors (24699962).

28925638 is a wasteful number, since it uses less digits than its factorization.

28925638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004.

The product of its digits is 207360, while the sum is 43.

The square root of 28925638 is about 5378.2560370440. The cubic root of 28925638 is about 306.9688559267.

The spelling of 28925638 in words is "twenty-eight million, nine hundred twenty-five thousand, six hundred thirty-eight".