28617750 has 192 divisors, whose sum is σ = 93450240. Its totient is φ = 6177600.

The previous prime is 28617733. The next prime is 28617763. The reversal of 28617750 is 5771682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 362211 + ... + 362289.

It is an arithmetic number, because the mean of its divisors is an integer number (486720).

Almost surely, 2^28617750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28617750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46725120).

28617750 is an abundant number, since it is smaller than the sum of its proper divisors (64832490).

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

28617750 is a wasteful number, since it uses less digits than its factorization.

28617750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 28617750 is about 5349.5560563471. The cubic root of 28617750 is about 305.8758306925.

The spelling of 28617750 in words is "twenty-eight million, six hundred seventeen thousand, seven hundred fifty".