268821020 has 24 divisors (see below), whose sum is σ = 607949664. Its totient is φ = 99256896.

The previous prime is 268821013. The next prime is 268821023. The reversal of 268821020 is 20128862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268821023) 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, 516704 + ... + 517223.

It is an arithmetic number, because the mean of its divisors is an integer number (25331236).

Almost surely, 2^268821020 is an apocalyptic number.

268821020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268821020 is an abundant number, since it is smaller than the sum of its proper divisors (339128644).

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

268821020 is a wasteful number, since it uses less digits than its factorization.

268821020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033949 (or 1033947 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 268821020 is about 16395.7622573639. The cubic root of 268821020 is about 645.3882805260.

Adding to 268821020 its reverse (20128862), we get a palindrome (288949882).

The spelling of 268821020 in words is "two hundred sixty-eight million, eight hundred twenty-one thousand, twenty".