80729730 has 32 divisors (see below), whose sum is σ = 215280000. Its totient is φ = 21527856.

The previous prime is 80729713. The next prime is 80729731. The reversal of 80729730 is 3792708.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80729731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149230 + ... + 149769.

It is an arithmetic number, because the mean of its divisors is an integer number (6727500).

Almost surely, 2^80729730 is an apocalyptic number.

80729730 is an abundant number, since it is smaller than the sum of its proper divisors (134550270).

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

80729730 is a wasteful number, since it uses less digits than its factorization.

80729730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299015 (or 299009 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 80729730 is about 8984.9724540479. The cubic root of 80729730 is about 432.1931042558.

The spelling of 80729730 in words is "eighty million, seven hundred twenty-nine thousand, seven hundred thirty".