378787728 has 80 divisors (see below), whose sum is σ = 1074788352. Its totient is φ = 114000000.

The previous prime is 378787723. The next prime is 378787733. The reversal of 378787728 is 827787873.

It is an interprime number because it is at equal distance from previous prime (378787723) and next prime (378787733).

It is not an unprimeable number, because it can be changed into a prime (378787723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77353 + ... + 82103.

Almost surely, 2^378787728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 378787728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537394176).

378787728 is an abundant number, since it is smaller than the sum of its proper divisors (696000624).

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

378787728 is a wasteful number, since it uses less digits than its factorization.

378787728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924 (or 4918 counting only the distinct ones).

The product of its digits is 7375872, while the sum is 57.

The square root of 378787728 is about 19462.4697302269. The cubic root of 378787728 is about 723.5445891098.

The spelling of 378787728 in words is "three hundred seventy-eight million, seven hundred eighty-seven thousand, seven hundred twenty-eight".