28938336 has 48 divisors (see below), whose sum is σ = 86817024. Its totient is φ = 8267904.

The previous prime is 28938313. The next prime is 28938383. The reversal of 28938336 is 63383982.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20860 + ... + 22203.

It is an arithmetic number, because the mean of its divisors is an integer number (1808688).

Almost surely, 2^28938336 is an apocalyptic number.

It is an amenable number.

28938336 is an abundant number, since it is smaller than the sum of its proper divisors (57878688).

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

28938336 is a wasteful number, since it uses less digits than its factorization.

28938336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43083 (or 43075 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 28938336 is about 5379.4364017060. The cubic root of 28938336 is about 307.0137678752.

The spelling of 28938336 in words is "twenty-eight million, nine hundred thirty-eight thousand, three hundred thirty-six".