7714640 has 40 divisors (see below), whose sum is σ = 18196008. Its totient is φ = 3041280.

The previous prime is 7714631. The next prime is 7714643. The reversal of 7714640 is 464177.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2534464 + 5180176 = 1592^2 + 2276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7714643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5180 + ... + 6500.

Almost surely, 2^7714640 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 7714640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9098004).

7714640 is an abundant number, since it is smaller than the sum of its proper divisors (10481368).

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

7714640 is a wasteful number, since it uses less digits than its factorization.

7714640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 7714640 is about 2777.5240773034. The cubic root of 7714640 is about 197.5931515927.

The spelling of 7714640 in words is "seven million, seven hundred fourteen thousand, six hundred forty".