7720470 has 48 divisors (see below), whose sum is σ = 20283120. Its totient is φ = 2037312.

The previous prime is 7720451. The next prime is 7720481. The reversal of 7720470 is 740277.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9417 + ... + 10203.

It is an arithmetic number, because the mean of its divisors is an integer number (422565).

Almost surely, 2^7720470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7720470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10141560).

7720470 is an abundant number, since it is smaller than the sum of its proper divisors (12562650).

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

7720470 is a wasteful number, since it uses less digits than its factorization.

7720470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 7720470 is about 2778.5733749534. The cubic root of 7720470 is about 197.6429131721.

The spelling of 7720470 in words is "seven million, seven hundred twenty thousand, four hundred seventy".