7728475 has 12 divisors (see below), whose sum is σ = 9685144. Its totient is φ = 6117120.

The previous prime is 7728463. The next prime is 7728527. The reversal of 7728475 is 5748277.

It is not a de Polignac number, because 7728475 - 2⁵ = 7728443 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a plaindrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 832 + ... + 4018.

Almost surely, 2^7728475 is an apocalyptic number.

7728475 is a deficient number, since it is larger than the sum of its proper divisors (1956669).

7728475 is a wasteful number, since it uses less digits than its factorization.

7728475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294 (or 3289 counting only the distinct ones).

The product of its digits is 109760, while the sum is 40.

The square root of 7728475 is about 2780.0134891759. The cubic root of 7728475 is about 197.7111985235.

The spelling of 7728475 in words is "seven million, seven hundred twenty-eight thousand, four hundred seventy-five".