7720048 has 60 divisors (see below), whose sum is σ = 17882040. Its totient is φ = 3217536.

The previous prime is 7720039. The next prime is 7720049. The reversal of 7720048 is 8400277.

It is a super-2 number, since 2×7720048² = 119198282244608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 7719998 and 7720025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33598 + ... + 33826.

It is an arithmetic number, because the mean of its divisors is an integer number (298034).

Almost surely, 2^7720048 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 7720048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8941020).

7720048 is an abundant number, since it is smaller than the sum of its proper divisors (10161992).

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

7720048 is a wasteful number, since it uses less digits than its factorization.

7720048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 7720048 is about 2778.4974356655. The cubic root of 7720048 is about 197.6393120602.

The spelling of 7720048 in words is "seven million, seven hundred twenty thousand, forty-eight".