28887408 has 80 divisors (see below), whose sum is σ = 90470400. Its totient is φ = 8752320.

The previous prime is 28887407. The next prime is 28887449. The reversal of 28887408 is 80478882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28887401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1713 + ... + 7791.

It is an arithmetic number, because the mean of its divisors is an integer number (1130880).

Almost surely, 2^28887408 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 28887408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45235200).

28887408 is an abundant number, since it is smaller than the sum of its proper divisors (61582992).

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

28887408 is a wasteful number, since it uses less digits than its factorization.

28887408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107 (or 6095 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 28887408 is about 5374.7007358550. The cubic root of 28887408 is about 306.8335596512.

It can be divided in two parts, 2888 and 7408, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 28887408 in words is "twenty-eight million, eight hundred eighty-seven thousand, four hundred eight".