34428073 has 4 divisors (see below), whose sum is σ = 35538688. Its totient is φ = 33317460.

The previous prime is 34428071. The next prime is 34428083. The reversal of 34428073 is 37082443.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37082443 = 383 ⋅96821.

It is a cyclic number.

It is not a de Polignac number, because 34428073 - 2¹ = 34428071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1110583 = 34428073 / (3 + 4 + 4 + 2 + 8 + 0 + 7 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34428071) 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 3 ways as a sum of consecutive naturals, for example, 555261 + ... + 555322.

It is an arithmetic number, because the mean of its divisors is an integer number (8884672).

Almost surely, 2^34428073 is an apocalyptic number.

It is an amenable number.

34428073 is a deficient number, since it is larger than the sum of its proper divisors (1110615).

34428073 is a wasteful number, since it uses less digits than its factorization.

34428073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110614.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 34428073 is about 5867.5440347730. The cubic root of 34428073 is about 325.3151121276.

The spelling of 34428073 in words is "thirty-four million, four hundred twenty-eight thousand, seventy-three".