259749728 has 24 divisors (see below), whose sum is σ = 584437392. Its totient is φ = 111321216.

The previous prime is 259749727. The next prime is 259749739. The reversal of 259749728 is 827947952.

It is a self number, because there is not a number n which added to its sum of digits gives 259749728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259749727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579575 + ... + 580022.

It is an arithmetic number, because the mean of its divisors is an integer number (24351558).

Almost surely, 2^259749728 is an apocalyptic number.

259749728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

259749728 is an abundant number, since it is smaller than the sum of its proper divisors (324687664).

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

259749728 is a wasteful number, since it uses less digits than its factorization.

259749728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159614 (or 1159606 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The square root of 259749728 is about 16116.7530228641. The cubic root of 259749728 is about 638.0455741267.

It can be divided in two parts, 2597 and 49728, that added together give a palindrome (52325).

The spelling of 259749728 in words is "two hundred fifty-nine million, seven hundred forty-nine thousand, seven hundred twenty-eight".