28738108 has 36 divisors (see below), whose sum is σ = 61589640. Its totient is φ = 11666592.

The previous prime is 28738097. The next prime is 28738117. The reversal of 28738108 is 80183782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135 + ... + 7582.

Almost surely, 2^28738108 is an apocalyptic number.

28738108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28738108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30794820).

28738108 is an abundant number, since it is smaller than the sum of its proper divisors (32851532).

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

28738108 is a wasteful number, since it uses less digits than its factorization.

28738108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7754 (or 7745 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 28738108 is about 5360.7935979666. The cubic root of 28738108 is about 306.3040394435.

The spelling of 28738108 in words is "twenty-eight million, seven hundred thirty-eight thousand, one hundred eight".