7280042069 has 4 divisors (see below), whose sum is σ = 7281754860. Its totient is φ = 7278329280.

The previous prime is 7280042027. The next prime is 7280042083. The reversal of 7280042069 is 9602400827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5022556900 + 2257485169 = 70870^2 + 47513^2 .

It is a cyclic number.

It is not a de Polignac number, because 7280042069 - 2¹⁶ = 7279976533 is a prime.

It is a super-2 number, since 2×7280042069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7280042009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850004 + ... + 858525.

It is an arithmetic number, because the mean of its divisors is an integer number (1820438715).

Almost surely, 2^7280042069 is an apocalyptic number.

It is an amenable number.

7280042069 is a deficient number, since it is larger than the sum of its proper divisors (1712791).

7280042069 is a wasteful number, since it uses less digits than its factorization.

7280042069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712790.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 7280042069 is about 85323.1625585925. The cubic root of 7280042069 is about 1938.1079499261.

The spelling of 7280042069 in words is "seven billion, two hundred eighty million, forty-two thousand, sixty-nine".