80390845 has 4 divisors (see below), whose sum is σ = 96469020. Its totient is φ = 64312672.

The previous prime is 80390839. The next prime is 80390861. The reversal of 80390845 is 54809308.

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 39200121 + 41190724 = 6261^2 + 6418^2 .

It is a cyclic number.

It is not a de Polignac number, because 80390845 - 2³ = 80390837 is a prime.

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, 8039080 + ... + 8039089.

It is an arithmetic number, because the mean of its divisors is an integer number (24117255).

Almost surely, 2^80390845 is an apocalyptic number.

It is an amenable number.

80390845 is a deficient number, since it is larger than the sum of its proper divisors (16078175).

80390845 is a wasteful number, since it uses less digits than its factorization.

80390845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16078174.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80390845 is about 8966.0941886643. The cubic root of 80390845 is about 431.5875067066.

The spelling of 80390845 in words is "eighty million, three hundred ninety thousand, eight hundred forty-five".