42744256 has 42 divisors (see below), whose sum is σ = 90142568. Its totient is φ = 20106240.

The previous prime is 42744227. The next prime is 42744271. The reversal of 42744256 is 65244724.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17341 + ... + 19651.

Almost surely, 2^42744256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42744256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45071284).

42744256 is an abundant number, since it is smaller than the sum of its proper divisors (47398312).

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

42744256 is a wasteful number, since it uses less digits than its factorization.

42744256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357 (or 2330 counting only the distinct ones).

The product of its digits is 53760, while the sum is 34.

The square root of 42744256 is about 6537.9091458967. The cubic root of 42744256 is about 349.6438717728.

The spelling of 42744256 in words is "forty-two million, seven hundred forty-four thousand, two hundred fifty-six".