740544640 has 128 divisors (see below), whose sum is σ = 1984201920. Its totient is φ = 261918720.

The previous prime is 740544613. The next prime is 740544653. The reversal of 740544640 is 46445047.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 740544596 and 740544605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259059 + ... + 261901.

Almost surely, 2^740544640 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 740544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992100960).

740544640 is an abundant number, since it is smaller than the sum of its proper divisors (1243657280).

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

740544640 is a wasteful number, since it uses less digits than its factorization.

740544640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 740544640 is about 27212.9498584773. The cubic root of 740544640 is about 904.7260202555.

Adding to 740544640 its reverse (46445047), we get a palindrome (786989687).

The spelling of 740544640 in words is "seven hundred forty million, five hundred forty-four thousand, six hundred forty".