740438520 has 64 divisors (see below), whose sum is σ = 2224091520. Its totient is φ = 197203584.

The previous prime is 740438509. The next prime is 740438551. The reversal of 740438520 is 25834047.

It is a Cunningham number, because it is equal to 27211²-1.

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 15 ways as a sum of consecutive naturals, for example, 105439 + ... + 112241.

It is an arithmetic number, because the mean of its divisors is an integer number (34751430).

Almost surely, 2^740438520 is an apocalyptic number.

It is an amenable number.

740438520 is an abundant number, since it is smaller than the sum of its proper divisors (1483653000).

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

740438520 is a wasteful number, since it uses less digits than its factorization.

740438520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7724 (or 7720 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 740438520 is about 27210.9999816251. Note that the first 4 decimals coincide. The cubic root of 740438520 is about 904.6828024640.

The spelling of 740438520 in words is "seven hundred forty million, four hundred thirty-eight thousand, five hundred twenty".