80503040 has 72 divisors (see below), whose sum is σ = 194936280. Its totient is φ = 31850496.

The previous prime is 80503039. The next prime is 80503067. The reversal of 80503040 is 4030508.

It can be written as a sum of positive squares in 4 ways, for example, as 39337984 + 41165056 = 6272^2 + 6416^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139232 + ... + 139808.

Almost surely, 2^80503040 is an apocalyptic number.

80503040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80503040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97468140).

80503040 is an abundant number, since it is smaller than the sum of its proper divisors (114433240).

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

80503040 is a wasteful number, since it uses less digits than its factorization.

80503040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 80503040 is about 8972.3486334404. The cubic root of 80503040 is about 431.7881906343.

Adding to 80503040 its reverse (4030508), we get a palindrome (84533548).

The spelling of 80503040 in words is "eighty million, five hundred three thousand, forty".