74140740 has 72 divisors (see below), whose sum is σ = 238132440. Its totient is φ = 18607104.

The previous prime is 74140727. The next prime is 74140783. The reversal of 74140740 is 4704147.

It can be written as a sum of positive squares in 4 ways, for example, as 4384836 + 69755904 = 2094^2 + 8352^2 .

It is a congruent number.

It is an unprimeable number.

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, 9055 + ... + 15174.

It is an arithmetic number, because the mean of its divisors is an integer number (3307395).

Almost surely, 2^74140740 is an apocalyptic number.

It is an amenable number.

74140740 is an abundant number, since it is smaller than the sum of its proper divisors (163991700).

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

74140740 is a wasteful number, since it uses less digits than its factorization.

74140740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24261 (or 24256 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 74140740 is about 8610.5017275418. The cubic root of 74140740 is about 420.0996362255.

Adding to 74140740 its reverse (4704147), we get a palindrome (78844887).

The spelling of 74140740 in words is "seventy-four million, one hundred forty thousand, seven hundred forty".