73818445 has 4 divisors (see below), whose sum is σ = 88582140. Its totient is φ = 59054752.

The previous prime is 73818443. The next prime is 73818449. The reversal of 73818445 is 54481837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54481837 = 6263 ⋅8699.

It can be written as a sum of positive squares in 2 ways, for example, as 24790441 + 49028004 = 4979^2 + 7002^2 .

It is a cyclic number.

It is not a de Polignac number, because 73818445 - 2¹ = 73818443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73818398 and 73818407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73818443) 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, 7381840 + ... + 7381849.

It is an arithmetic number, because the mean of its divisors is an integer number (22145535).

Almost surely, 2^73818445 is an apocalyptic number.

It is an amenable number.

73818445 is a deficient number, since it is larger than the sum of its proper divisors (14763695).

73818445 is a wasteful number, since it uses less digits than its factorization.

73818445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14763694.

The product of its digits is 107520, while the sum is 40.

The square root of 73818445 is about 8591.7661164629. The cubic root of 73818445 is about 419.4900178185.

The spelling of 73818445 in words is "seventy-three million, eight hundred eighteen thousand, four hundred forty-five".