74135540 has 12 divisors (see below), whose sum is σ = 155684676. Its totient is φ = 29654208.

The previous prime is 74135533. The next prime is 74135543. The reversal of 74135540 is 4553147.

It can be written as a sum of positive squares in 2 ways, for example, as 53085796 + 21049744 = 7286^2 + 4588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74135543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853369 + ... + 1853408.

It is an arithmetic number, because the mean of its divisors is an integer number (12973723).

Almost surely, 2^74135540 is an apocalyptic number.

It is an amenable number.

74135540 is an abundant number, since it is smaller than the sum of its proper divisors (81549136).

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

74135540 is a wasteful number, since it uses less digits than its factorization.

74135540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706786 (or 3706784 counting only the distinct ones).

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

The square root of 74135540 is about 8610.1997653945. The cubic root of 74135540 is about 420.0898145036.

Adding to 74135540 its reverse (4553147), we get a palindrome (78688687).

The spelling of 74135540 in words is "seventy-four million, one hundred thirty-five thousand, five hundred forty".