80857746 has 48 divisors (see below), whose sum is σ = 187644600. Its totient is φ = 25073664.

The previous prime is 80857741. The next prime is 80857747. The reversal of 80857746 is 64775808.

It can be written as a sum of positive squares in 4 ways, for example, as 42107121 + 38750625 = 6489^2 + 6225^2 .

It is a congruent number.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25750 + ... + 28718.

Almost surely, 2^80857746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80857746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93822300).

80857746 is an abundant number, since it is smaller than the sum of its proper divisors (106786854).

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

80857746 is a wasteful number, since it uses less digits than its factorization.

80857746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 80857746 is about 8992.0935270937. The cubic root of 80857746 is about 432.4214315944.

The spelling of 80857746 in words is "eighty million, eight hundred fifty-seven thousand, seven hundred forty-six".