20072880 has 80 divisors (see below), whose sum is σ = 69147360. Its totient is φ = 5352192.

The previous prime is 20072867. The next prime is 20072917. The reversal of 20072880 is 8827002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20072880² = 805841022988800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (864342).

Almost surely, 2^20072880 is an apocalyptic number.

20072880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20072880 is an abundant number, since it is smaller than the sum of its proper divisors (49074480).

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

20072880 is a wasteful number, since it uses less digits than its factorization.

20072880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9315 (or 9303 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 20072880 is about 4480.2767771646. The cubic root of 20072880 is about 271.7710732388.

Adding to 20072880 its reverse (8827002), we get a palindrome (28899882).

The spelling of 20072880 in words is "twenty million, seventy-two thousand, eight hundred eighty".