256342406 has 16 divisors (see below), whose sum is σ = 402970464. Its totient is φ = 122067264.

The previous prime is 256342403. The next prime is 256342409. The reversal of 256342406 is 604243652.

It is an interprime number because it is at equal distance from previous prime (256342403) and next prime (256342409).

It is a super-2 number, since 2×256342406² = 131422858227737672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256342403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241 + ... + 22676.

It is an arithmetic number, because the mean of its divisors is an integer number (25185654).

Almost surely, 2^256342406 is an apocalyptic number.

256342406 is a deficient number, since it is larger than the sum of its proper divisors (146628058).

256342406 is a wasteful number, since it uses less digits than its factorization.

256342406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24175.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 256342406 is about 16010.6966119529. The cubic root of 256342406 is about 635.2433861487.

The spelling of 256342406 in words is "two hundred fifty-six million, three hundred forty-two thousand, four hundred six".