80011520 has 72 divisors (see below), whose sum is σ = 202981464. Its totient is φ = 30113792.

The previous prime is 80011513. The next prime is 80011523. The reversal of 80011520 is 2511008.

It can be written as a sum of positive squares in 4 ways, for example, as 27709696 + 52301824 = 5264^2 + 7232^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (80011523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19922 + ... + 23598.

It is an arithmetic number, because the mean of its divisors is an integer number (2819187).

Almost surely, 2^80011520 is an apocalyptic number.

80011520 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 80011520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101490732).

80011520 is an abundant number, since it is smaller than the sum of its proper divisors (122969944).

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

80011520 is a wasteful number, since it uses less digits than its factorization.

80011520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715 (or 3701 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 80011520 is about 8944.9158743948. The cubic root of 80011520 is about 430.9076195867.

Adding to 80011520 its reverse (2511008), we get a palindrome (82522528).

The spelling of 80011520 in words is "eighty million, eleven thousand, five hundred twenty".