74123540 has 24 divisors (see below), whose sum is σ = 158213832. Its totient is φ = 29162880.

The previous prime is 74123537. The next prime is 74123603. The reversal of 74123540 is 4532147.

It can be written as a sum of positive squares in 4 ways, for example, as 232324 + 73891216 = 482^2 + 8596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29159 + ... + 31598.

It is an arithmetic number, because the mean of its divisors is an integer number (6592243).

Almost surely, 2^74123540 is an apocalyptic number.

It is an amenable number.

74123540 is an abundant number, since it is smaller than the sum of its proper divisors (84090292).

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

74123540 is a wasteful number, since it uses less digits than its factorization.

74123540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60827 (or 60825 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 74123540 is about 8609.5028892498. The cubic root of 74123540 is about 420.0671472386.

Adding to 74123540 its reverse (4532147), we get a palindrome (78655687).

The spelling of 74123540 in words is "seventy-four million, one hundred twenty-three thousand, five hundred forty".