75449140 has 24 divisors (see below), whose sum is σ = 170631720. Its totient is φ = 27858048.

The previous prime is 75449137. The next prime is 75449149. The reversal of 75449140 is 4194457.

It can be written as a sum of positive squares in 4 ways, for example, as 3640464 + 71808676 = 1908^2 + 8474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75449096 and 75449105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75449149) 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, 144835 + ... + 145354.

It is an arithmetic number, because the mean of its divisors is an integer number (7109655).

Almost surely, 2^75449140 is an apocalyptic number.

It is an amenable number.

75449140 is an abundant number, since it is smaller than the sum of its proper divisors (95182580).

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

75449140 is a wasteful number, since it uses less digits than its factorization.

75449140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290211 (or 290209 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 75449140 is about 8686.1464413168. The cubic root of 75449140 is about 422.5564785672.

It can be divided in two parts, 754 and 49140, that added together give a palindrome (49894).

The spelling of 75449140 in words is "seventy-five million, four hundred forty-nine thousand, one hundred forty".