249256728 has 96 divisors (see below), whose sum is σ = 787332000. Its totient is φ = 71209152.

The previous prime is 249256723. The next prime is 249256747. The reversal of 249256728 is 827652942.

249256728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249256723) 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, 19650 + ... + 29742.

It is an arithmetic number, because the mean of its divisors is an integer number (8201375).

Almost surely, 2^249256728 is an apocalyptic number.

249256728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249256728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393666000).

249256728 is an abundant number, since it is smaller than the sum of its proper divisors (538075272).

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

249256728 is a wasteful number, since it uses less digits than its factorization.

249256728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126 (or 10105 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 249256728 is about 15787.8664803070. The cubic root of 249256728 is about 629.3355958555.

The spelling of 249256728 in words is "two hundred forty-nine million, two hundred fifty-six thousand, seven hundred twenty-eight".