74844540 has 192 divisors, whose sum is σ = 255467520. Its totient is φ = 18109440.

The previous prime is 74844527. The next prime is 74844551. The reversal of 74844540 is 4544847.

74844540 is a `hidden beast` number, since 74 + 8 + 44 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74844495 and 74844504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 284449 + ... + 284711.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^74844540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74844540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127733760).

74844540 is an abundant number, since it is smaller than the sum of its proper divisors (180622980).

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

74844540 is a wasteful number, since it uses less digits than its factorization.

74844540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The square root of 74844540 is about 8651.2738946354. The cubic root of 74844540 is about 421.4247532246.

The spelling of 74844540 in words is "seventy-four million, eight hundred forty-four thousand, five hundred forty".