80691408 has 60 divisors (see below), whose sum is σ = 258087648. Its totient is φ = 23054400.

The previous prime is 80691371. The next prime is 80691421. The reversal of 80691408 is 80419608.

It is a happy number.

It is a super-2 number, since 2×80691408² = 13022206650044928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39018 + ... + 41033.

Almost surely, 2^80691408 is an apocalyptic number.

It is an amenable number.

80691408 is an abundant number, since it is smaller than the sum of its proper divisors (177396240).

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

80691408 is a wasteful number, since it uses less digits than its factorization.

80691408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80072 (or 80063 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80691408 is about 8982.8396401138. The cubic root of 80691408 is about 432.1247067954.

The spelling of 80691408 in words is "eighty million, six hundred ninety-one thousand, four hundred eight".