7720461 has 16 divisors (see below), whose sum is σ = 13072000. Its totient is φ = 4411584.

The previous prime is 7720451. The next prime is 7720481. The reversal of 7720461 is 1640277.

It is not a de Polignac number, because 7720461 - 2⁵ = 7720429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

7720461 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720451) 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 15 ways as a sum of consecutive naturals, for example, 20236 + ... + 20613.

It is an arithmetic number, because the mean of its divisors is an integer number (817000).

Almost surely, 2^7720461 is an apocalyptic number.

It is an amenable number.

7720461 is a deficient number, since it is larger than the sum of its proper divisors (5351539).

7720461 is a wasteful number, since it uses less digits than its factorization.

7720461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40865 (or 40859 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 7720461 is about 2778.5717554168. The cubic root of 7720461 is about 197.6428363725.

The spelling of 7720461 in words is "seven million, seven hundred twenty thousand, four hundred sixty-one".