402788368 has 40 divisors (see below), whose sum is σ = 802281240. Its totient is φ = 195824640.

The previous prime is 402788341. The next prime is 402788369. The reversal of 402788368 is 863887204.

It can be written as a sum of positive squares in 4 ways, for example, as 16744464 + 386043904 = 4092^2 + 19648^2 .

It is a super-3 number, since 3×402788368³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (402788369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84546 + ... + 89182.

It is an arithmetic number, because the mean of its divisors is an integer number (20057031).

Almost surely, 2^402788368 is an apocalyptic number.

It is an amenable number.

402788368 is a deficient number, since it is larger than the sum of its proper divisors (399492872).

402788368 is a wasteful number, since it uses less digits than its factorization.

402788368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795 (or 4789 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 402788368 is about 20069.5881372788. The cubic root of 402788368 is about 738.5144094135.

The spelling of 402788368 in words is "four hundred two million, seven hundred eighty-eight thousand, three hundred sixty-eight".