7720465 has 16 divisors (see below), whose sum is σ = 9977040. Its totient is φ = 5713920.

The previous prime is 7720451. The next prime is 7720481. The reversal of 7720465 is 5640277.

It can be written as a sum of positive squares in 8 ways, for example, as 1048576 + 6671889 = 1024^2 + 2583^2 .

It is not a de Polignac number, because 7720465 - 2⁷ = 7720337 is a prime.

It is a d-powerful number, because it can be written as 7⁴ + 7⁸ + 2⁷ + 0 + 4 + 6 + 5⁹ .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4441 + ... + 5929.

It is an arithmetic number, because the mean of its divisors is an integer number (623565).

Almost surely, 2^7720465 is an apocalyptic number.

It is an amenable number.

7720465 is a deficient number, since it is larger than the sum of its proper divisors (2256575).

7720465 is a wasteful number, since it uses less digits than its factorization.

7720465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 7720465 is about 2778.5724752110. The cubic root of 7720465 is about 197.6428705057.

The spelling of 7720465 in words is "seven million, seven hundred twenty thousand, four hundred sixty-five".