7280000 has 160 divisors (see below), whose sum is σ = 22305360. Its totient is φ = 2304000.

The previous prime is 7279999. The next prime is 7280011. The reversal of 7280000 is 827.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 559994 + ... + 560006.

Almost surely, 2^7280000 is an apocalyptic number.

7280000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11152680).

7280000 is an abundant number, since it is smaller than the sum of its proper divisors (15025360).

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

7280000 is an equidigital number, since it uses as much as digits as its factorization.

7280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 7280000 is about 2698.1475126464. The cubic root of 7280000 is about 193.8104216687.

Adding to 7280000 its reverse (827), we get a palindrome (7280827).

It can be divided in two parts, 72 and 80000, that multiplied together give a square (5760000 = 2400²).

The spelling of 7280000 in words is "seven million, two hundred eighty thousand".