80079978 has 48 divisors (see below), whose sum is σ = 178573248. Its totient is φ = 23918400.

The previous prime is 80079973. The next prime is 80079983. The reversal of 80079978 is 87997008.

It is an interprime number because it is at equal distance from previous prime (80079973) and next prime (80079983).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80079973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52243 + ... + 53753.

It is an arithmetic number, because the mean of its divisors is an integer number (3720276).

Almost surely, 2^80079978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80079978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89286624).

80079978 is an abundant number, since it is smaller than the sum of its proper divisors (98493270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80079978 is a wasteful number, since it uses less digits than its factorization.

80079978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 80079978 is about 8948.7416992558. The cubic root of 80079978 is about 431.0304796643.

The spelling of 80079978 in words is "eighty million, seventy-nine thousand, nine hundred seventy-eight".