4256388 has 72 divisors (see below), whose sum is σ = 11618880. Its totient is φ = 1360800.

The previous prime is 4256383. The next prime is 4256389. The reversal of 4256388 is 8836524.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (4256381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28113 + ... + 28263.

Almost surely, 2^4256388 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 4256388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5809440).

4256388 is an abundant number, since it is smaller than the sum of its proper divisors (7362492).

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

4256388 is a wasteful number, since it uses less digits than its factorization.

4256388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 185 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 4256388 is about 2063.1015486398. The cubic root of 4256388 is about 162.0617048890.

The spelling of 4256388 in words is "four million, two hundred fifty-six thousand, three hundred eighty-eight".