80748978 has 16 divisors (see below), whose sum is σ = 162170976. Its totient is φ = 26804160.

The previous prime is 80748977. The next prime is 80748979. The reversal of 80748978 is 87984708.

It is an interprime number because it is at equal distance from previous prime (80748977) and next prime (80748979).

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 80748978.

It is not an unprimeable number, because it can be changed into a prime (80748977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26476 + ... + 29367.

It is an arithmetic number, because the mean of its divisors is an integer number (10135686).

Almost surely, 2^80748978 is an apocalyptic number.

80748978 is an abundant number, since it is smaller than the sum of its proper divisors (81421998).

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

80748978 is a wasteful number, since it uses less digits than its factorization.

80748978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56089.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 80748978 is about 8986.0435120246. The cubic root of 80748978 is about 432.2274500985.

The spelling of 80748978 in words is "eighty million, seven hundred forty-eight thousand, nine hundred seventy-eight".