7720475 has 24 divisors (see below), whose sum is σ = 11049888. Its totient is φ = 5241600.

The previous prime is 7720451. The next prime is 7720481. The reversal of 7720475 is 5740277.

It is a happy number.

It is not a de Polignac number, because 7720475 - 2¹⁰ = 7719451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27335 + ... + 27615.

It is an arithmetic number, because the mean of its divisors is an integer number (460412).

Almost surely, 2^7720475 is an apocalyptic number.

7720475 is a deficient number, since it is larger than the sum of its proper divisors (3329413).

7720475 is a wasteful number, since it uses less digits than its factorization.

7720475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 7720475 is about 2778.5742746956. The cubic root of 7720475 is about 197.6429558385.

The spelling of 7720475 in words is "seven million, seven hundred twenty thousand, four hundred seventy-five".