7278828 has 12 divisors (see below), whose sum is σ = 16983960. Its totient is φ = 2426272.

The previous prime is 7278827. The next prime is 7278829. The reversal of 7278828 is 8288727.

It is an interprime number because it is at equal distance from previous prime (7278827) and next prime (7278829).

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

It is a self number, because there is not a number n which added to its sum of digits gives 7278828.

It is not an unprimeable number, because it can be changed into a prime (7278827) 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, 303273 + ... + 303296.

It is an arithmetic number, because the mean of its divisors is an integer number (1415330).

Almost surely, 2^7278828 is an apocalyptic number.

It is an amenable number.

7278828 is an abundant number, since it is smaller than the sum of its proper divisors (9705132).

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

7278828 is a wasteful number, since it uses less digits than its factorization.

7278828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606576 (or 606574 counting only the distinct ones).

The product of its digits is 100352, while the sum is 42.

The square root of 7278828 is about 2697.9303178548. The cubic root of 7278828 is about 193.8000206611.

The spelling of 7278828 in words is "seven million, two hundred seventy-eight thousand, eight hundred twenty-eight".