80402705 has 8 divisors (see below), whose sum is σ = 96534504. Its totient is φ = 64288000.

The previous prime is 80402701. The next prime is 80402713. The reversal of 80402705 is 50720408.

It can be written as a sum of positive squares in 4 ways, for example, as 8288641 + 72114064 = 2879^2 + 8492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80402705 - 2² = 80402701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80402701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11135 + ... + 16875.

It is an arithmetic number, because the mean of its divisors is an integer number (12066813).

Almost surely, 2^80402705 is an apocalyptic number.

It is an amenable number.

80402705 is a deficient number, since it is larger than the sum of its proper divisors (16131799).

80402705 is a wasteful number, since it uses less digits than its factorization.

80402705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 80402705 is about 8966.7555447888. The cubic root of 80402705 is about 431.6087295881.

The spelling of 80402705 in words is "eighty million, four hundred two thousand, seven hundred five".