80402678 has 4 divisors (see below), whose sum is σ = 120604020. Its totient is φ = 40201338.

The previous prime is 80402671. The next prime is 80402701. The reversal of 80402678 is 87620408.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80402671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20100668 + ... + 20100671.

It is an arithmetic number, because the mean of its divisors is an integer number (30151005).

Almost surely, 2^80402678 is an apocalyptic number.

80402678 is a deficient number, since it is larger than the sum of its proper divisors (40201342).

80402678 is a wasteful number, since it uses less digits than its factorization.

80402678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40201341.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 80402678 is about 8966.7540392274. The cubic root of 80402678 is about 431.6086812754.

The spelling of 80402678 in words is "eighty million, four hundred two thousand, six hundred seventy-eight".