75818385 has 24 divisors (see below), whose sum is σ = 139150440. Its totient is φ = 38057472.

The previous prime is 75818371. The next prime is 75818387. The reversal of 75818385 is 58381857.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25010001 + 50808384 = 5001^2 + 7128^2 .

It is not a de Polignac number, because 75818385 - 2⁷ = 75818257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 75818385.

It is not an unprimeable number, because it can be changed into a prime (75818387) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 48790 + ... + 50319.

It is an arithmetic number, because the mean of its divisors is an integer number (5797935).

Almost surely, 2^75818385 is an apocalyptic number.

It is an amenable number.

75818385 is a deficient number, since it is larger than the sum of its proper divisors (63332055).

75818385 is a wasteful number, since it uses less digits than its factorization.

75818385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99137 (or 99134 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 75818385 is about 8707.3753221048. The cubic root of 75818385 is about 423.2446818037.

The spelling of 75818385 in words is "seventy-five million, eight hundred eighteen thousand, three hundred eighty-five".