80520720 has 240 divisors, whose sum is σ = 299230848. Its totient is φ = 17848320.

The previous prime is 80520719. The next prime is 80520763. The reversal of 80520720 is 2702508.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 482077 + ... + 482243.

Almost surely, 2^80520720 is an apocalyptic number.

80520720 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 80520720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149615424).

80520720 is an abundant number, since it is smaller than the sum of its proper divisors (218710128).

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

80520720 is a wasteful number, since it uses less digits than its factorization.

80520720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 80520720 is about 8973.3338286280. Note that the first 3 decimals coincide. The cubic root of 80520720 is about 431.8197979558.

The spelling of 80520720 in words is "eighty million, five hundred twenty thousand, seven hundred twenty".