80493778 has 4 divisors (see below), whose sum is σ = 120740670. Its totient is φ = 40246888.

The previous prime is 80493761. The next prime is 80493781. The reversal of 80493778 is 87739408.

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., 58936329 + 21557449 = 7677^2 + 4643^2 .

It is an unprimeable number.

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, 20123443 + ... + 20123446.

Almost surely, 2^80493778 is an apocalyptic number.

80493778 is a deficient number, since it is larger than the sum of its proper divisors (40246892).

80493778 is a wasteful number, since it uses less digits than its factorization.

80493778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40246891.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 80493778 is about 8971.8324772590. The cubic root of 80493778 is about 431.7716306981.

The spelling of 80493778 in words is "eighty million, four hundred ninety-three thousand, seven hundred seventy-eight".