80440394 has 4 divisors (see below), whose sum is σ = 120660594. Its totient is φ = 40220196.

The previous prime is 80440343. The next prime is 80440397. The reversal of 80440394 is 49304408.

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

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 69169 = 8965^2 + 263^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80440394.

It is not an unprimeable number, because it can be changed into a prime (80440397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110097 + ... + 20110100.

Almost surely, 2^80440394 is an apocalyptic number.

80440394 is a deficient number, since it is larger than the sum of its proper divisors (40220200).

80440394 is a wasteful number, since it uses less digits than its factorization.

80440394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40220199.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 80440394 is about 8968.8568948334. The cubic root of 80440394 is about 431.6761583326.

The spelling of 80440394 in words is "eighty million, four hundred forty thousand, three hundred ninety-four".