7028388 has 36 divisors (see below), whose sum is σ = 17951388. Its totient is φ = 2318400.

The previous prime is 7028381. The next prime is 7028389. The reversal of 7028388 is 8838207.

It can be written as a sum of positive squares in 2 ways, for example, as 5963364 + 1065024 = 2442^2 + 1032^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (7028381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2670 + ... + 4602.

Almost surely, 2^7028388 is an apocalyptic number.

It is an amenable number.

7028388 is an abundant number, since it is smaller than the sum of its proper divisors (10923000).

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

7028388 is a wasteful number, since it uses less digits than its factorization.

7028388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 7028388 is about 2651.1107106268. The cubic root of 7028388 is about 191.5513613549.

The spelling of 7028388 in words is "seven million, twenty-eight thousand, three hundred eighty-eight".