80820734 has 4 divisors (see below), whose sum is σ = 121231104. Its totient is φ = 40410366.

The previous prime is 80820731. The next prime is 80820757. The reversal of 80820734 is 43702808.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 80820734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80820731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20205182 + ... + 20205185.

It is an arithmetic number, because the mean of its divisors is an integer number (30307776).

Almost surely, 2^80820734 is an apocalyptic number.

80820734 is a deficient number, since it is larger than the sum of its proper divisors (40410370).

80820734 is a wasteful number, since it uses less digits than its factorization.

80820734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40410369.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 80820734 is about 8990.0352613324. The cubic root of 80820734 is about 432.3554423501.

The spelling of 80820734 in words is "eighty million, eight hundred twenty thousand, seven hundred thirty-four".