844540740 has 72 divisors (see below), whose sum is σ = 2597894208. Its totient is φ = 222035520.

The previous prime is 844540733. The next prime is 844540757. The reversal of 844540740 is 47045448.

844540740 is a `hidden beast` number, since 8 + 44 + 540 + 74 + 0 = 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 = 844540695 and 844540704.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20262 + ... + 45821.

It is an arithmetic number, because the mean of its divisors is an integer number (36081864).

Almost surely, 2^844540740 is an apocalyptic number.

It is an amenable number.

844540740 is an abundant number, since it is smaller than the sum of its proper divisors (1753353468).

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

844540740 is a wasteful number, since it uses less digits than its factorization.

844540740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66169 (or 66164 counting only the distinct ones).

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

The square root of 844540740 is about 29060.9831217046. The cubic root of 844540740 is about 945.2358863566.

The spelling of 844540740 in words is "eight hundred forty-four million, five hundred forty thousand, seven hundred forty".