7280913 has 16 divisors (see below), whose sum is σ = 10333440. Its totient is φ = 4544256.

The previous prime is 7280891. The next prime is 7280927. The reversal of 7280913 is 3190827.

It is a happy number.

It is not a de Polignac number, because 7280913 - 2⁵ = 7280881 is a prime.

It is a super-2 number, since 2×7280913² = 106023388227138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7280953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18523 + ... + 18911.

It is an arithmetic number, because the mean of its divisors is an integer number (645840).

Almost surely, 2^7280913 is an apocalyptic number.

It is an amenable number.

7280913 is a deficient number, since it is larger than the sum of its proper divisors (3052527).

7280913 is a wasteful number, since it uses less digits than its factorization.

7280913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 7280913 is about 2698.3166974986. The cubic root of 7280913 is about 193.8185233865.

The spelling of 7280913 in words is "seven million, two hundred eighty thousand, nine hundred thirteen".