239407728 has 60 divisors (see below), whose sum is σ = 719451720. Its totient is φ = 68401536.

The previous prime is 239407711. The next prime is 239407757. The reversal of 239407728 is 827704932.

It is a super-2 number, since 2×239407728² = 114632120452243968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 239407728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48543 + ... + 53246.

It is an arithmetic number, because the mean of its divisors is an integer number (11990862).

Almost surely, 2^239407728 is an apocalyptic number.

239407728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

239407728 is an abundant number, since it is smaller than the sum of its proper divisors (480043992).

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

239407728 is a wasteful number, since it uses less digits than its factorization.

239407728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101814 (or 101801 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 239407728 is about 15472.8060803463. The cubic root of 239407728 is about 620.9348782067.

The spelling of 239407728 in words is "two hundred thirty-nine million, four hundred seven thousand, seven hundred twenty-eight".