80649290 has 32 divisors (see below), whose sum is σ = 155036160. Its totient is φ = 30139200.

The previous prime is 80649269. The next prime is 80649299. The reversal of 80649290 is 9294608.

It is not an unprimeable number, because it can be changed into a prime (80649299) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4505 + ... + 13475.

It is an arithmetic number, because the mean of its divisors is an integer number (4844880).

Almost surely, 2^80649290 is an apocalyptic number.

80649290 is a deficient number, since it is larger than the sum of its proper divisors (74386870).

80649290 is a wasteful number, since it uses less digits than its factorization.

80649290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9038.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 80649290 is about 8980.4949752227. The cubic root of 80649290 is about 432.0495092149.

The spelling of 80649290 in words is "eighty million, six hundred forty-nine thousand, two hundred ninety".