80992978 has 8 divisors (see below), whose sum is σ = 132534000. Its totient is φ = 36814980.

The previous prime is 80992943. The next prime is 80992979. The reversal of 80992978 is 87929908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (80992979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1840728 + ... + 1840771.

It is an arithmetic number, because the mean of its divisors is an integer number (16566750).

Almost surely, 2^80992978 is an apocalyptic number.

80992978 is a deficient number, since it is larger than the sum of its proper divisors (51541022).

80992978 is a wasteful number, since it uses less digits than its factorization.

80992978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681512.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 80992978 is about 8999.6098804337. The cubic root of 80992978 is about 432.6623676735.

The spelling of 80992978 in words is "eighty million, nine hundred ninety-two thousand, nine hundred seventy-eight".