256873415 has 8 divisors (see below), whose sum is σ = 309421728. Its totient is φ = 204716320.

The previous prime is 256873403. The next prime is 256873439. The reversal of 256873415 is 514378652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256873415 - 2¹⁶ = 256807879 is a prime.

It is a Duffinian number.

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, 96356 + ... + 98985.

It is an arithmetic number, because the mean of its divisors is an integer number (38677716).

Almost surely, 2^256873415 is an apocalyptic number.

256873415 is a deficient number, since it is larger than the sum of its proper divisors (52548313).

256873415 is a wasteful number, since it uses less digits than its factorization.

256873415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195609.

The product of its digits is 201600, while the sum is 41.

The square root of 256873415 is about 16027.2709779301. The cubic root of 256873415 is about 635.6817156349.

The spelling of 256873415 in words is "two hundred fifty-six million, eight hundred seventy-three thousand, four hundred fifteen".