7823428 has 12 divisors (see below), whose sum is σ = 14061292. Its totient is φ = 3805920.

The previous prime is 7823423. The next prime is 7823429. The reversal of 7823428 is 8243287.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 1633284 = 2488^2 + 1278^2 .

It is a super-2 number, since 2×7823428² = 122412051342368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7823393 and 7823402.

It is not an unprimeable number, because it can be changed into a prime (7823423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26283 + ... + 26578.

Almost surely, 2^7823428 is an apocalyptic number.

It is an amenable number.

7823428 is a deficient number, since it is larger than the sum of its proper divisors (6237864).

7823428 is a wasteful number, since it uses less digits than its factorization.

7823428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52902 (or 52900 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 7823428 is about 2797.0391488143. The cubic root of 7823428 is about 198.5176063583.

The spelling of 7823428 in words is "seven million, eight hundred twenty-three thousand, four hundred twenty-eight".