80442500 has 60 divisors (see below), whose sum is σ = 183691200. Its totient is φ = 30756000.

The previous prime is 80442473. The next prime is 80442517. The reversal of 80442500 is 524408.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56801 + ... + 58199.

It is an arithmetic number, because the mean of its divisors is an integer number (3061520).

Almost surely, 2^80442500 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 80442500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91845600).

80442500 is an abundant number, since it is smaller than the sum of its proper divisors (103248700).

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

80442500 is a wasteful number, since it uses less digits than its factorization.

80442500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 80442500 is about 8968.9743003311. The cubic root of 80442500 is about 431.6799255198.

Adding to 80442500 its reverse (524408), we get a palindrome (80966908).

The spelling of 80442500 in words is "eighty million, four hundred forty-two thousand, five hundred".