28597128 has 192 divisors, whose sum is σ = 94310400. Its totient is φ = 7050240.

The previous prime is 28597099. The next prime is 28597139. The reversal of 28597128 is 82179582.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 28597128.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 922473 + ... + 922503.

It is an arithmetic number, because the mean of its divisors is an integer number (491200).

Almost surely, 2^28597128 is an apocalyptic number.

28597128 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 28597128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47155200).

28597128 is an abundant number, since it is smaller than the sum of its proper divisors (65713272).

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

28597128 is a wasteful number, since it uses less digits than its factorization.

28597128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 79 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 28597128 is about 5347.6282593314. The cubic root of 28597128 is about 305.8023414872.

The spelling of 28597128 in words is "twenty-eight million, five hundred ninety-seven thousand, one hundred twenty-eight".