20280260 has 96 divisors (see below), whose sum is σ = 57238272. Its totient is φ = 5829120.

The previous prime is 20280259. The next prime is 20280287. The reversal of 20280260 is 6208202.

It is a super-2 number, since 2×20280260² = 822577891335200, which contains 22 as substring.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 19514 + ... + 20526.

It is an arithmetic number, because the mean of its divisors is an integer number (596232).

Almost surely, 2^20280260 is an apocalyptic number.

20280260 is a gapful number since it is divisible by the number (20) 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 20280260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28619136).

20280260 is an abundant number, since it is smaller than the sum of its proper divisors (36958012).

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

20280260 is a wasteful number, since it uses less digits than its factorization.

20280260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20280260 is about 4503.3609671000. The cubic root of 20280260 is about 272.7037894258.

Adding to 20280260 its reverse (6208202), we get a palindrome (26488462).

The spelling of 20280260 in words is "twenty million, two hundred eighty thousand, two hundred sixty".