80773978 has 16 divisors (see below), whose sum is σ = 127743840. Its totient is φ = 38199600.

The previous prime is 80773969. The next prime is 80773981. The reversal of 80773978 is 87937708.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29508 + ... + 32128.

It is an arithmetic number, because the mean of its divisors is an integer number (7983990).

Almost surely, 2^80773978 is an apocalyptic number.

80773978 is a deficient number, since it is larger than the sum of its proper divisors (46969862).

80773978 is a wasteful number, since it uses less digits than its factorization.

80773978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 80773978 is about 8987.4344503868. The cubic root of 80773978 is about 432.2720515765.

The spelling of 80773978 in words is "eighty million, seven hundred seventy-three thousand, nine hundred seventy-eight".