80640426 has 8 divisors (see below), whose sum is σ = 161280864. Its totient is φ = 26880140.

The previous prime is 80640407. The next prime is 80640431. The reversal of 80640426 is 62404608.

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

80640426 is an admirable number.

It is a super-2 number, since 2×80640426² = 13005756610922952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80640393 and 80640402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6720030 + ... + 6720041.

It is an arithmetic number, because the mean of its divisors is an integer number (20160108).

Almost surely, 2^80640426 is an apocalyptic number.

80640426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

80640426 is a wasteful number, since it uses less digits than its factorization.

80640426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13440076.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 80640426 is about 8980.0014476614. The cubic root of 80640426 is about 432.0336800730.

The spelling of 80640426 in words is "eighty million, six hundred forty thousand, four hundred twenty-six".