7280045 has 8 divisors (see below), whose sum is σ = 8879640. Its totient is φ = 5728320.

The previous prime is 7280041. The next prime is 7280051. The reversal of 7280045 is 5400827.

7280045 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 7070281 = 458^2 + 2659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7280045 - 2² = 7280041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7279996 and 7280023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7280041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11630 + ... + 12239.

It is an arithmetic number, because the mean of its divisors is an integer number (1109955).

Almost surely, 2^7280045 is an apocalyptic number.

It is an amenable number.

7280045 is a deficient number, since it is larger than the sum of its proper divisors (1599595).

7280045 is a wasteful number, since it uses less digits than its factorization.

7280045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23935.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 7280045 is about 2698.1558516883. The cubic root of 7280045 is about 193.8108210025.

The spelling of 7280045 in words is "seven million, two hundred eighty thousand, forty-five".