7822428 has 12 divisors (see below), whose sum is σ = 18252360. Its totient is φ = 2607472.

The previous prime is 7822427. The next prime is 7822439. The reversal of 7822428 is 8242287.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×7822428² = 122380759630368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7822427) 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, 325923 + ... + 325946.

It is an arithmetic number, because the mean of its divisors is an integer number (1521030).

Almost surely, 2^7822428 is an apocalyptic number.

It is an amenable number.

7822428 is an abundant number, since it is smaller than the sum of its proper divisors (10429932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7822428 is a wasteful number, since it uses less digits than its factorization.

7822428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651876 (or 651874 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 7822428 is about 2796.8603826434. The cubic root of 7822428 is about 198.5091477447.

The spelling of 7822428 in words is "seven million, eight hundred twenty-two thousand, four hundred twenty-eight".