28800138 has 8 divisors (see below), whose sum is σ = 57600288. Its totient is φ = 9600044.

The previous prime is 28800137. The next prime is 28800199. The reversal of 28800138 is 83100882.

It is a sphenic number, since it is the product of 3 distinct primes.

28800138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28800131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400006 + ... + 2400017.

It is an arithmetic number, because the mean of its divisors is an integer number (7200036).

Almost surely, 2^28800138 is an apocalyptic number.

28800138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28800138 is a wasteful number, since it uses less digits than its factorization.

28800138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800028.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28800138 is about 5366.5760033750. The cubic root of 28800138 is about 306.5242625432.

The spelling of 28800138 in words is "twenty-eight million, eight hundred thousand, one hundred thirty-eight".