75231040 has 56 divisors (see below), whose sum is σ = 180091080. Its totient is φ = 29933568.

The previous prime is 75231019. The next prime is 75231041. The reversal of 75231040 is 4013257.

It can be written as a sum of positive squares in 4 ways, for example, as 304704 + 74926336 = 552^2 + 8656^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75231041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74056 + ... + 75064.

Almost surely, 2^75231040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90045540).

75231040 is an abundant number, since it is smaller than the sum of its proper divisors (104860040).

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

75231040 is a wasteful number, since it uses less digits than its factorization.

75231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 75231040 is about 8673.5828813703. The cubic root of 75231040 is about 422.1489258219.

Adding to 75231040 its reverse (4013257), we get a palindrome (79244297).

The spelling of 75231040 in words is "seventy-five million, two hundred thirty-one thousand, forty".