80857744 has 40 divisors (see below), whose sum is σ = 173479968. Its totient is φ = 36199680.

The previous prime is 80857741. The next prime is 80857747. The reversal of 80857744 is 44775808.

It is an interprime number because it is at equal distance from previous prime (80857741) and next prime (80857747).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 80857744.

It is not an unprimeable number, because it can be changed into a prime (80857741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8364 + ... + 15220.

Almost surely, 2^80857744 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 80857744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86739984).

80857744 is an abundant number, since it is smaller than the sum of its proper divisors (92622224).

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

80857744 is a wasteful number, since it uses less digits than its factorization.

80857744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6943 (or 6937 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 80857744 is about 8992.0934158849. The cubic root of 80857744 is about 432.4214280291.

The spelling of 80857744 in words is "eighty million, eight hundred fifty-seven thousand, seven hundred forty-four".