74345140 has 12 divisors (see below), whose sum is σ = 156124836. Its totient is φ = 29738048.

The previous prime is 74345129. The next prime is 74345147. The reversal of 74345140 is 4154347.

It can be written as a sum of positive squares in 2 ways, for example, as 46403344 + 27941796 = 6812^2 + 5286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74345099 and 74345108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74345147) 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, 1858609 + ... + 1858648.

It is an arithmetic number, because the mean of its divisors is an integer number (13010403).

Almost surely, 2^74345140 is an apocalyptic number.

It is an amenable number.

74345140 is an abundant number, since it is smaller than the sum of its proper divisors (81779696).

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

74345140 is a wasteful number, since it uses less digits than its factorization.

74345140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3717266 (or 3717264 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 74345140 is about 8622.3627852231. The cubic root of 74345140 is about 420.4853421841.

Adding to 74345140 its reverse (4154347), we get a palindrome (78499487).

The spelling of 74345140 in words is "seventy-four million, three hundred forty-five thousand, one hundred forty".