80640036 has 36 divisors (see below), whose sum is σ = 211392272. Its totient is φ = 26879688.

The previous prime is 80640031. The next prime is 80640059. The reversal of 80640036 is 63004608.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 80639991 and 80640009.

It is not an unprimeable number, because it can be changed into a prime (80640031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40510 + ... + 42453.

Almost surely, 2^80640036 is an apocalyptic number.

It is an amenable number.

80640036 is an abundant number, since it is smaller than the sum of its proper divisors (130752236).

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

80640036 is a wasteful number, since it uses less digits than its factorization.

80640036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82982 (or 82968 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 80640036 is about 8979.9797327165. The cubic root of 80640036 is about 432.0329835927.

The spelling of 80640036 in words is "eighty million, six hundred forty thousand, thirty-six".