80621870 has 64 divisors (see below), whose sum is σ = 171417600. Its totient is φ = 26732160.

The previous prime is 80621869. The next prime is 80621881. The reversal of 80621870 is 7812608.

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 31 ways as a sum of consecutive naturals, for example, 337211 + ... + 337449.

It is an arithmetic number, because the mean of its divisors is an integer number (2678400).

Almost surely, 2^80621870 is an apocalyptic number.

80621870 is an abundant number, since it is smaller than the sum of its proper divisors (90795730).

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

80621870 is a wasteful number, since it uses less digits than its factorization.

80621870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 80621870 is about 8978.9682035298. The cubic root of 80621870 is about 432.0005394083. Note that the first 3 decimals are identical.

The spelling of 80621870 in words is "eighty million, six hundred twenty-one thousand, eight hundred seventy".