80639220 has 24 divisors (see below), whose sum is σ = 225789984. Its totient is φ = 21503776.

The previous prime is 80639201. The next prime is 80639239. The reversal of 80639220 is 2293608.

It is an interprime number because it is at equal distance from previous prime (80639201) and next prime (80639239).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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, 671934 + ... + 672053.

It is an arithmetic number, because the mean of its divisors is an integer number (9407916).

Almost surely, 2^80639220 is an apocalyptic number.

It is an amenable number.

80639220 is an abundant number, since it is smaller than the sum of its proper divisors (145150764).

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

80639220 is a wasteful number, since it uses less digits than its factorization.

80639220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343999 (or 1343997 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 80639220 is about 8979.9342982006. The cubic root of 80639220 is about 432.0315263343.

The spelling of 80639220 in words is "eighty million, six hundred thirty-nine thousand, two hundred twenty".