80042090 has 16 divisors (see below), whose sum is σ = 144216072. Its totient is φ = 31985664.

The previous prime is 80042029. The next prime is 80042101. The reversal of 80042090 is 9024008.

It can be written as a sum of positive squares in 4 ways, for example, as 76755121 + 3286969 = 8761^2 + 1813^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8882 + ... + 15458.

Almost surely, 2^80042090 is an apocalyptic number.

80042090 is a deficient number, since it is larger than the sum of its proper divisors (64173982).

80042090 is a wasteful number, since it uses less digits than its factorization.

80042090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7801.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 80042090 is about 8946.6245031297. The cubic root of 80042090 is about 430.9624915545.

Adding to 80042090 its reverse (9024008), we get a palindrome (89066098).

The spelling of 80042090 in words is "eighty million, forty-two thousand, ninety".