7713820840 has 32 divisors (see below), whose sum is σ = 18933924960. Its totient is φ = 2805025600.

The previous prime is 7713820837. The next prime is 7713820841. The reversal of 7713820840 is 480283177.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 7713820793 and 7713820802.

It is not an unprimeable number, because it can be changed into a prime (7713820841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8765266 + ... + 8766145.

It is an arithmetic number, because the mean of its divisors is an integer number (591685155).

Almost surely, 2^7713820840 is an apocalyptic number.

It is an amenable number.

7713820840 is an abundant number, since it is smaller than the sum of its proper divisors (11220104120).

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

7713820840 is a wasteful number, since it uses less digits than its factorization.

7713820840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17531433 (or 17531429 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 7713820840 is about 87828.3601122098. The cubic root of 7713820840 is about 1975.8615769819.

The spelling of 7713820840 in words is "seven billion, seven hundred thirteen million, eight hundred twenty thousand, eight hundred forty".