80402218 has 8 divisors (see below), whose sum is σ = 129880548. Its totient is φ = 37108704.

The previous prime is 80402213. The next prime is 80402237. The reversal of 80402218 is 81220408.

It can be written as a sum of positive squares in 2 ways, for example, as 79798489 + 603729 = 8933^2 + 777^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 80402192 and 80402201.

It is not an unprimeable number, because it can be changed into a prime (80402213) 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, 1546171 + ... + 1546222.

Almost surely, 2^80402218 is an apocalyptic number.

80402218 is a deficient number, since it is larger than the sum of its proper divisors (49478330).

80402218 is a wasteful number, since it uses less digits than its factorization.

80402218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092408.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 80402218 is about 8966.7283888830. The cubic root of 80402218 is about 431.6078581669.

The spelling of 80402218 in words is "eighty million, four hundred two thousand, two hundred eighteen".