80820510 has 16 divisors (see below), whose sum is σ = 193969296. Its totient is φ = 21552128.

The previous prime is 80820463. The next prime is 80820511. The reversal of 80820510 is 1502808.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80820511) 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 7 ways as a sum of consecutive naturals, for example, 1346979 + ... + 1347038.

It is an arithmetic number, because the mean of its divisors is an integer number (12123081).

Almost surely, 2^80820510 is an apocalyptic number.

80820510 is an abundant number, since it is smaller than the sum of its proper divisors (113148786).

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

80820510 is a wasteful number, since it uses less digits than its factorization.

80820510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694027.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 80820510 is about 8990.0228030857. The cubic root of 80820510 is about 432.3550429158.

The spelling of 80820510 in words is "eighty million, eight hundred twenty thousand, five hundred ten".