80903556 has 48 divisors (see below), whose sum is σ = 211740480. Its totient is φ = 26712000.

The previous prime is 80903551. The next prime is 80903567. The reversal of 80903556 is 65530908.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 80903556.

It is not an unprimeable number, because it can be changed into a prime (80903551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8056 + ... + 15056.

It is an arithmetic number, because the mean of its divisors is an integer number (4411260).

Almost surely, 2^80903556 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 80903556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105870240).

80903556 is an abundant number, since it is smaller than the sum of its proper divisors (130836924).

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

80903556 is a wasteful number, since it uses less digits than its factorization.

80903556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7121 (or 7113 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 80903556 is about 8994.6404041518. The cubic root of 80903556 is about 432.5030790430.

The spelling of 80903556 in words is "eighty million, nine hundred three thousand, five hundred fifty-six".