80725736 has 128 divisors (see below), whose sum is σ = 198912000. Its totient is φ = 30481920.

The previous prime is 80725703. The next prime is 80725769. The reversal of 80725736 is 63752708.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80725703) and next prime (80725769).

It is a self number, because there is not a number n which added to its sum of digits gives 80725736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1105796 + ... + 1105868.

It is an arithmetic number, because the mean of its divisors is an integer number (1554000).

Almost surely, 2^80725736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80725736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99456000).

80725736 is an abundant number, since it is smaller than the sum of its proper divisors (118186264).

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

80725736 is a wasteful number, since it uses less digits than its factorization.

80725736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 80725736 is about 8984.7501912964. The cubic root of 80725736 is about 432.1859767382.

The spelling of 80725736 in words is "eighty million, seven hundred twenty-five thousand, seven hundred thirty-six".