75247728 has 20 divisors (see below), whose sum is σ = 194390088. Its totient is φ = 25082560.

The previous prime is 75247693. The next prime is 75247747. The reversal of 75247728 is 82774257.

It is a self number, because there is not a number n which added to its sum of digits gives 75247728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783783 + ... + 783878.

Almost surely, 2^75247728 is an apocalyptic number.

It is an amenable number.

75247728 is an abundant number, since it is smaller than the sum of its proper divisors (119142360).

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

75247728 is a wasteful number, since it uses less digits than its factorization.

75247728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567672 (or 1567666 counting only the distinct ones).

The product of its digits is 219520, while the sum is 42.

The square root of 75247728 is about 8674.5448295573. The cubic root of 75247728 is about 422.1801376747.

The spelling of 75247728 in words is "seventy-five million, two hundred forty-seven thousand, seven hundred twenty-eight".