4278235728 has 160 divisors (see below), whose sum is σ = 12099225600. Its totient is φ = 1294824960.

The previous prime is 4278235723. The next prime is 4278235763. The reversal of 4278235728 is 8275328724.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278235723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16266925 + ... + 16267187.

It is an arithmetic number, because the mean of its divisors is an integer number (75620160).

Almost surely, 2^4278235728 is an apocalyptic number.

4278235728 is a gapful number since it is divisible by the number (48) 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 4278235728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6049612800).

4278235728 is an abundant number, since it is smaller than the sum of its proper divisors (7820989872).

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

4278235728 is a wasteful number, since it uses less digits than its factorization.

4278235728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 611 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 48.

The square root of 4278235728 is about 65408.2237031400. The cubic root of 4278235728 is about 1623.3851543409.

The spelling of 4278235728 in words is "four billion, two hundred seventy-eight million, two hundred thirty-five thousand, seven hundred twenty-eight".