73780285 has 4 divisors (see below), whose sum is σ = 88536348. Its totient is φ = 59024224.

The previous prime is 73780253. The next prime is 73780313. The reversal of 73780285 is 58208737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58208737 = 419 ⋅138923.

It can be written as a sum of positive squares in 2 ways, for example, as 17799961 + 55980324 = 4219^2 + 7482^2 .

It is a cyclic number.

It is not a de Polignac number, because 73780285 - 2⁵ = 73780253 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7378024 + ... + 7378033.

It is an arithmetic number, because the mean of its divisors is an integer number (22134087).

Almost surely, 2^73780285 is an apocalyptic number.

It is an amenable number.

73780285 is a deficient number, since it is larger than the sum of its proper divisors (14756063).

73780285 is a wasteful number, since it uses less digits than its factorization.

73780285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14756062.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 73780285 is about 8589.5450985486. The cubic root of 73780285 is about 419.4177210809.

The spelling of 73780285 in words is "seventy-three million, seven hundred eighty thousand, two hundred eighty-five".