256023020 has 48 divisors (see below), whose sum is σ = 606765600. Its totient is φ = 89886720.

The previous prime is 256022993. The next prime is 256023037. The reversal of 256023020 is 20320652.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 256022983 and 256023001.

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, 13685 + ... + 26444.

It is an arithmetic number, because the mean of its divisors is an integer number (12640950).

Almost surely, 2^256023020 is an apocalyptic number.

256023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256023020 is an abundant number, since it is smaller than the sum of its proper divisors (350742580).

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

256023020 is a wasteful number, since it uses less digits than its factorization.

256023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40178 (or 40176 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 256023020 is about 16000.7193588288. The cubic root of 256023020 is about 634.9794524940.

Adding to 256023020 its reverse (20320652), we get a palindrome (276343672).

The spelling of 256023020 in words is "two hundred fifty-six million, twenty-three thousand, twenty".