75775728 has 40 divisors (see below), whose sum is σ = 223719808. Its totient is φ = 21650112.

The previous prime is 75775723. The next prime is 75775747. The reversal of 75775728 is 82757757.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75775723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112426 + ... + 113097.

Almost surely, 2^75775728 is an apocalyptic number.

It is an amenable number.

75775728 is an abundant number, since it is smaller than the sum of its proper divisors (147944080).

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

75775728 is a wasteful number, since it uses less digits than its factorization.

75775728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225541 (or 225535 counting only the distinct ones).

The product of its digits is 960400, while the sum is 48.

The square root of 75775728 is about 8704.9255022659. The cubic root of 75775728 is about 423.1652914932.

The spelling of 75775728 in words is "seventy-five million, seven hundred seventy-five thousand, seven hundred twenty-eight".