80729064 has 48 divisors (see below), whose sum is σ = 235462500. Its totient is φ = 24839424.

The previous prime is 80729063. The next prime is 80729071. The reversal of 80729064 is 46092708.

It can be written as a sum of positive squares in 2 ways, for example, as 79388100 + 1340964 = 8910^2 + 1158^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (80729063) 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, 42189 + ... + 44060.

Almost surely, 2^80729064 is an apocalyptic number.

It is an amenable number.

80729064 is an abundant number, since it is smaller than the sum of its proper divisors (154733436).

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

80729064 is a wasteful number, since it uses less digits than its factorization.

80729064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86274 (or 86267 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 80729064 is about 8984.9353920882. The cubic root of 80729064 is about 432.1919157577.

The spelling of 80729064 in words is "eighty million, seven hundred twenty-nine thousand, sixty-four".