28953888 has 48 divisors (see below), whose sum is σ = 76728960. Its totient is φ = 9559296.

The previous prime is 28953887. The next prime is 28953889. The reversal of 28953888 is 88835982.

It is an interprime number because it is at equal distance from previous prime (28953887) and next prime (28953889).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28953888.

It is not an unprimeable number, because it can be changed into a prime (28953887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9081 + ... + 11847.

It is an arithmetic number, because the mean of its divisors is an integer number (1598520).

Almost surely, 2^28953888 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 28953888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38364480).

28953888 is an abundant number, since it is smaller than the sum of its proper divisors (47775072).

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

28953888 is a wasteful number, since it uses less digits than its factorization.

28953888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889 (or 2881 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 28953888 is about 5380.8817121360. The cubic root of 28953888 is about 307.0687563288.

The spelling of 28953888 in words is "twenty-eight million, nine hundred fifty-three thousand, eight hundred eighty-eight".