7290028 has 12 divisors (see below), whose sum is σ = 12783960. Its totient is φ = 3637472.

The previous prime is 7290001. The next prime is 7290037. The reversal of 7290028 is 8200927.

It is a junction number, because it is equal to n+sod(n) for n = 7289978 and 7290005.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675 + ... + 3877.

It is an arithmetic number, because the mean of its divisors is an integer number (1065330).

Almost surely, 2^7290028 is an apocalyptic number.

It is an amenable number.

7290028 is a deficient number, since it is larger than the sum of its proper divisors (5493932).

7290028 is a wasteful number, since it uses less digits than its factorization.

7290028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776 (or 3774 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7290028 is about 2700.0051851802. The cubic root of 7290028 is about 193.8993703502.

Subtracting from 7290028 its sum of digits (28), we obtain a square (7290000 = 2700²).

It can be divided in two parts, 72 and 90028, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 7290028 in words is "seven million, two hundred ninety thousand, twenty-eight".