7700720 has 20 divisors (see below), whose sum is σ = 17904360. Its totient is φ = 3080256.

The previous prime is 7700717. The next prime is 7700723. The reversal of 7700720 is 270077.

It is an interprime number because it is at equal distance from previous prime (7700717) and next prime (7700723).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7700723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48050 + ... + 48209.

It is an arithmetic number, because the mean of its divisors is an integer number (895218).

Almost surely, 2^7700720 is an apocalyptic number.

It is an amenable number.

7700720 is an abundant number, since it is smaller than the sum of its proper divisors (10203640).

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

7700720 is a wasteful number, since it uses less digits than its factorization.

7700720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96272 (or 96266 counting only the distinct ones).

The product of its (nonzero) digits is 686, while the sum is 23.

The square root of 7700720 is about 2775.0171170643. The cubic root of 7700720 is about 197.4742368787.

Adding to 7700720 its reverse (270077), we get a palindrome (7970797).

The spelling of 7700720 in words is "seven million, seven hundred thousand, seven hundred twenty".