74535140 has 48 divisors (see below), whose sum is σ = 166570992. Its totient is φ = 27918336.

The previous prime is 74535137. The next prime is 74535143. The reversal of 74535140 is 4153547.

It is an interprime number because it is at equal distance from previous prime (74535137) and next prime (74535143).

It can be written as a sum of positive squares in 8 ways, for example, as 1364224 + 73170916 = 1168^2 + 8554^2 .

It is not an unprimeable number, because it can be changed into a prime (74535143) 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 15 ways as a sum of consecutive naturals, for example, 86954 + ... + 87806.

It is an arithmetic number, because the mean of its divisors is an integer number (3470229).

Almost surely, 2^74535140 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 74535140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83285496).

74535140 is an abundant number, since it is smaller than the sum of its proper divisors (92035852).

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

74535140 is a wasteful number, since it uses less digits than its factorization.

74535140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 74535140 is about 8633.3736163796. The cubic root of 74535140 is about 420.8432416275.

Adding to 74535140 its reverse (4153547), we get a palindrome (78688687).

The spelling of 74535140 in words is "seventy-four million, five hundred thirty-five thousand, one hundred forty".