239797728 has 36 divisors (see below), whose sum is σ = 681925608. Its totient is φ = 79932480.

The previous prime is 239797721. The next prime is 239797729. The reversal of 239797728 is 827797932.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239797721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 416028 + ... + 416603.

It is an arithmetic number, because the mean of its divisors is an integer number (18942378).

Almost surely, 2^239797728 is an apocalyptic number.

It is an amenable number.

239797728 is an abundant number, since it is smaller than the sum of its proper divisors (442127880).

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

239797728 is a wasteful number, since it uses less digits than its factorization.

239797728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832647 (or 832636 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 239797728 is about 15485.4037080084. The cubic root of 239797728 is about 621.2718670840.

The spelling of 239797728 in words is "two hundred thirty-nine million, seven hundred ninety-seven thousand, seven hundred twenty-eight".