75227778 has 40 divisors (see below), whose sum is σ = 169374348. Its totient is φ = 24955776.

The previous prime is 75227717. The next prime is 75227807. The reversal of 75227778 is 87772257.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75116889 + 110889 = 8667^2 + 333^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36750 + ... + 38742.

Almost surely, 2^75227778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75227778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84687174).

75227778 is an abundant number, since it is smaller than the sum of its proper divisors (94146570).

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

75227778 is a wasteful number, since it uses less digits than its factorization.

75227778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240 (or 2231 counting only the distinct ones).

The product of its digits is 384160, while the sum is 45.

The square root of 75227778 is about 8673.3948370866. The cubic root of 75227778 is about 422.1428243081.

The spelling of 75227778 in words is "seventy-five million, two hundred twenty-seven thousand, seven hundred seventy-eight".