256003420 has 12 divisors (see below), whose sum is σ = 537607224. Its totient is φ = 102401360.

The previous prime is 256003417. The next prime is 256003439. The reversal of 256003420 is 24300652.

It is a happy number.

256003420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×256003420³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256003391 and 256003400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6400066 + ... + 6400105.

It is an arithmetic number, because the mean of its divisors is an integer number (44800602).

Almost surely, 2^256003420 is an apocalyptic number.

256003420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256003420 is an abundant number, since it is smaller than the sum of its proper divisors (281603804).

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

256003420 is a wasteful number, since it uses less digits than its factorization.

256003420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12800180 (or 12800178 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 256003420 is about 16000.1068746431. The cubic root of 256003420 is about 634.9632483328.

The spelling of 256003420 in words is "two hundred fifty-six million, three thousand, four hundred twenty".