256212280 has 32 divisors (see below), whose sum is σ = 590541840. Its totient is φ = 99984640.

The previous prime is 256212277. The next prime is 256212293. The reversal of 256212280 is 82212652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76474 + ... + 79753.

Almost surely, 2^256212280 is an apocalyptic number.

256212280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256212280 is an abundant number, since it is smaller than the sum of its proper divisors (334329560).

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

256212280 is a wasteful number, since it uses less digits than its factorization.

256212280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156279 (or 156275 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 256212280 is about 16006.6323753624. The cubic root of 256212280 is about 635.1358793272.

The spelling of 256212280 in words is "two hundred fifty-six million, two hundred twelve thousand, two hundred eighty".