80857404 has 18 divisors (see below), whose sum is σ = 204389640. Its totient is φ = 26952456.

The previous prime is 80857379. The next prime is 80857411. The reversal of 80857404 is 40475808.

80857404 is a `hidden beast` number, since 80 + 8 + 574 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2246039 = 80857404 / (8 + 0 + 8 + 5 + 7 + 4 + 0 + 4).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1122984 + ... + 1123055.

It is an arithmetic number, because the mean of its divisors is an integer number (11354980).

Almost surely, 2^80857404 is an apocalyptic number.

It is an amenable number.

80857404 is an abundant number, since it is smaller than the sum of its proper divisors (123532236).

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

80857404 is a wasteful number, since it uses less digits than its factorization.

80857404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246049 (or 2246044 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 80857404 is about 8992.0745103674. The cubic root of 80857404 is about 432.4208219297.

The spelling of 80857404 in words is "eighty million, eight hundred fifty-seven thousand, four hundred four".