7290428 has 12 divisors (see below), whose sum is σ = 12777240. Its totient is φ = 3639792.

The previous prime is 7290403. The next prime is 7290449. The reversal of 7290428 is 8240927.

It is a hoax number, since the sum of its digits (32) 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 = 7290394 and 7290403.

It is a congruent number.

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, 4175 + ... + 5657.

It is an arithmetic number, because the mean of its divisors is an integer number (1064770).

Almost surely, 2^7290428 is an apocalyptic number.

It is an amenable number.

7290428 is a deficient number, since it is larger than the sum of its proper divisors (5486812).

7290428 is a wasteful number, since it uses less digits than its factorization.

7290428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7290428 is about 2700.0792580960. The cubic root of 7290428 is about 193.9029166708.

The spelling of 7290428 in words is "seven million, two hundred ninety thousand, four hundred twenty-eight".