7866428 has 6 divisors (see below), whose sum is σ = 13766256. Its totient is φ = 3933212.

The previous prime is 7866413. The next prime is 7866431. The reversal of 7866428 is 8246687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983300 + ... + 983307.

It is an arithmetic number, because the mean of its divisors is an integer number (2294376).

Almost surely, 2^7866428 is an apocalyptic number.

It is an amenable number.

7866428 is a deficient number, since it is larger than the sum of its proper divisors (5899828).

7866428 is a wasteful number, since it uses less digits than its factorization.

7866428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966611 (or 1966609 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 7866428 is about 2804.7153153217. The cubic root of 7866428 is about 198.8806469310.

The spelling of 7866428 in words is "seven million, eight hundred sixty-six thousand, four hundred twenty-eight".