256893742 has 16 divisors (see below), whose sum is σ = 444667392. Its totient is φ = 109027800.

The previous prime is 256893727. The next prime is 256893757. The reversal of 256893742 is 247398652.

It is an interprime number because it is at equal distance from previous prime (256893727) and next prime (256893757).

It is a junction number, because it is equal to n+sod(n) for n = 256893692 and 256893701.

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, 87634 + ... + 90517.

It is an arithmetic number, because the mean of its divisors is an integer number (27791712).

Almost surely, 2^256893742 is an apocalyptic number.

256893742 is a deficient number, since it is larger than the sum of its proper divisors (187773650).

256893742 is a wasteful number, since it uses less digits than its factorization.

256893742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178263.

The product of its digits is 725760, while the sum is 46.

The square root of 256893742 is about 16027.9051032878. The cubic root of 256893742 is about 635.6984828578.

The spelling of 256893742 in words is "two hundred fifty-six million, eight hundred ninety-three thousand, seven hundred forty-two".