75022728 has 128 divisors (see below), whose sum is σ = 215654400. Its totient is φ = 21542400.

The previous prime is 75022723. The next prime is 75022747. The reversal of 75022728 is 82722057.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (75022721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728325 + ... + 728427.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^75022728 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 75022728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107827200).

75022728 is an abundant number, since it is smaller than the sum of its proper divisors (140631672).

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

75022728 is a wasteful number, since it uses less digits than its factorization.

75022728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 75022728 is about 8661.5661401389. The cubic root of 75022728 is about 421.7589273210.

The spelling of 75022728 in words is "seventy-five million, twenty-two thousand, seven hundred twenty-eight".