7280889 has 32 divisors (see below), whose sum is σ = 12401664. Its totient is φ = 3689280.

The previous prime is 7280881. The next prime is 7280891. The reversal of 7280889 is 9880827.

It is a happy number.

It is not a de Polignac number, because 7280889 - 2³ = 7280881 is a prime.

It is a super-2 number, since 2×7280889² = 106022689260642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7280889.

It is not an unprimeable number, because it can be changed into a prime (7280881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9567 + ... + 10299.

It is an arithmetic number, because the mean of its divisors is an integer number (387552).

Almost surely, 2^7280889 is an apocalyptic number.

It is an amenable number.

7280889 is a deficient number, since it is larger than the sum of its proper divisors (5120775).

7280889 is a wasteful number, since it uses less digits than its factorization.

7280889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 7280889 is about 2698.3122502779. The cubic root of 7280889 is about 193.8183104256.

The spelling of 7280889 in words is "seven million, two hundred eighty thousand, eight hundred eighty-nine".