74151540 has 72 divisors (see below), whose sum is σ = 234718848. Its totient is φ = 18912960.

The previous prime is 74151529. The next prime is 74151541. The reversal of 74151540 is 4515147.

It is a happy number.

74151540 is a `hidden beast` number, since 74 + 1 + 51 + 540 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74151541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4816 + ... + 13095.

It is an arithmetic number, because the mean of its divisors is an integer number (3259984).

Almost surely, 2^74151540 is an apocalyptic number.

It is an amenable number.

74151540 is an abundant number, since it is smaller than the sum of its proper divisors (160567308).

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

74151540 is a wasteful number, since it uses less digits than its factorization.

74151540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17949 (or 17944 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 74151540 is about 8611.1288458599. The cubic root of 74151540 is about 420.1200337190.

Adding to 74151540 its reverse (4515147), we get a palindrome (78666687).

It can be divided in two parts, 74151 and 540, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 74151540 in words is "seventy-four million, one hundred fifty-one thousand, five hundred forty".