28738908 has 96 divisors (see below), whose sum is σ = 86123520. Its totient is φ = 8190720.

The previous prime is 28738889. The next prime is 28738939. The reversal of 28738908 is 80983782.

It is a super-3 number, since 3×28738908³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19485 + ... + 20907.

It is an arithmetic number, because the mean of its divisors is an integer number (897120).

Almost surely, 2^28738908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28738908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43061760).

28738908 is an abundant number, since it is smaller than the sum of its proper divisors (57384612).

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

28738908 is a wasteful number, since it uses less digits than its factorization.

28738908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 28738908 is about 5360.8682132655. The cubic root of 28738908 is about 306.3068816737.

It can be divided in two parts, 28738 and 908, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28738908 in words is "twenty-eight million, seven hundred thirty-eight thousand, nine hundred eight".