256390467 has 8 divisors (see below), whose sum is σ = 349804224. Its totient is φ = 166951848.

The previous prime is 256390439. The next prime is 256390469. The reversal of 256390467 is 764093652.

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

It is not a de Polignac number, because 256390467 - 2⁷ = 256390339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256390469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993633 + ... + 993890.

It is an arithmetic number, because the mean of its divisors is an integer number (43725528).

Almost surely, 2^256390467 is an apocalyptic number.

256390467 is a deficient number, since it is larger than the sum of its proper divisors (93413757).

256390467 is a wasteful number, since it uses less digits than its factorization.

256390467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987569.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 256390467 is about 16012.1974444484. The cubic root of 256390467 is about 635.2830837353.

The spelling of 256390467 in words is "two hundred fifty-six million, three hundred ninety thousand, four hundred sixty-seven".