75381780 has 48 divisors (see below), whose sum is σ = 216224064. Its totient is φ = 19610880.

The previous prime is 75381751. The next prime is 75381781. The reversal of 75381780 is 8718357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75381781) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12862 + ... + 17781.

It is an arithmetic number, because the mean of its divisors is an integer number (4504668).

Almost surely, 2^75381780 is an apocalyptic number.

It is an amenable number.

75381780 is an abundant number, since it is smaller than the sum of its proper divisors (140842284).

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

75381780 is a wasteful number, since it uses less digits than its factorization.

75381780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30696 (or 30694 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 75381780 is about 8682.2681368407. The cubic root of 75381780 is about 422.4306901700.

The spelling of 75381780 in words is "seventy-five million, three hundred eighty-one thousand, seven hundred eighty".