80204905 has 16 divisors (see below), whose sum is σ = 108384768. Its totient is φ = 56448000.

The previous prime is 80204903. The next prime is 80204939. The reversal of 80204905 is 50940208.

It is a happy number.

It is not a de Polignac number, because 80204905 - 2¹ = 80204903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80204903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21816 + ... + 25225.

It is an arithmetic number, because the mean of its divisors is an integer number (6774048).

Almost surely, 2^80204905 is an apocalyptic number.

It is an amenable number.

80204905 is a deficient number, since it is larger than the sum of its proper divisors (28179863).

80204905 is a wasteful number, since it uses less digits than its factorization.

80204905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47088.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 80204905 is about 8955.7191224379. The cubic root of 80204905 is about 431.2545030686.

The spelling of 80204905 in words is "eighty million, two hundred four thousand, nine hundred five".