75049780 has 24 divisors (see below), whose sum is σ = 169728552. Its totient is φ = 27710592.

The previous prime is 75049771. The next prime is 75049789. The reversal of 75049780 is 8794057.

It is an interprime number because it is at equal distance from previous prime (75049771) and next prime (75049789).

It can be written as a sum of positive squares in 4 ways, for example, as 3579664 + 71470116 = 1892^2 + 8454^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75049789) 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 7 ways as a sum of consecutive naturals, for example, 144067 + ... + 144586.

It is an arithmetic number, because the mean of its divisors is an integer number (7072023).

Almost surely, 2^75049780 is an apocalyptic number.

It is an amenable number.

75049780 is an abundant number, since it is smaller than the sum of its proper divisors (94678772).

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

75049780 is a wasteful number, since it uses less digits than its factorization.

75049780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288675 (or 288673 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 75049780 is about 8663.1276107420. The cubic root of 75049780 is about 421.8096144116.

The spelling of 75049780 in words is "seventy-five million, forty-nine thousand, seven hundred eighty".