378258728 has 16 divisors (see below), whose sum is σ = 709492500. Its totient is φ = 189060736.

The previous prime is 378258719. The next prime is 378258737. The reversal of 378258728 is 827852873.

It is an interprime number because it is at equal distance from previous prime (378258719) and next prime (378258737).

It can be written as a sum of positive squares in 2 ways, for example, as 369485284 + 8773444 = 19222^2 + 2962^2 .

It is a super-3 number, since 3×378258728³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20738 + ... + 34446.

Almost surely, 2^378258728 is an apocalyptic number.

It is an amenable number.

378258728 is a deficient number, since it is larger than the sum of its proper divisors (331233772).

378258728 is a wasteful number, since it uses less digits than its factorization.

378258728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17164 (or 17160 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 50.

The square root of 378258728 is about 19448.8747232327. The cubic root of 378258728 is about 723.2076075782.

The spelling of 378258728 in words is "three hundred seventy-eight million, two hundred fifty-eight thousand, seven hundred twenty-eight".