28437888 has 64 divisors (see below), whose sum is σ = 76377600. Its totient is φ = 9374208.

The previous prime is 28437869. The next prime is 28437901. The reversal of 28437888 is 88873482.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 39193 + ... + 39911.

It is an arithmetic number, because the mean of its divisors is an integer number (1193400).

Almost surely, 2^28437888 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 28437888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38188800).

28437888 is an abundant number, since it is smaller than the sum of its proper divisors (47939712).

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

28437888 is a wasteful number, since it uses less digits than its factorization.

28437888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 827 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 28437888 is about 5332.7186312424. The cubic root of 28437888 is about 305.2336756224.

It can be divided in two parts, 2843 and 7888, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 28437888 in words is "twenty-eight million, four hundred thirty-seven thousand, eight hundred eighty-eight".