80638402 has 8 divisors (see below), whose sum is σ = 130262076. Its totient is φ = 37217712.

The previous prime is 80638351. The next prime is 80638433. The reversal of 80638402 is 20483608.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78872161 + 1766241 = 8881^2 + 1329^2 .

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

It is a super-2 number, since 2×80638402² = 13005103754227208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550713 + ... + 1550764.

Almost surely, 2^80638402 is an apocalyptic number.

80638402 is a deficient number, since it is larger than the sum of its proper divisors (49623674).

80638402 is a wasteful number, since it uses less digits than its factorization.

80638402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101492.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 80638402 is about 8979.8887520949. Note that the first 3 decimals coincide. The cubic root of 80638402 is about 432.0300654944.

The spelling of 80638402 in words is "eighty million, six hundred thirty-eight thousand, four hundred two".