402381338 has 4 divisors (see below), whose sum is σ = 603572010. Its totient is φ = 201190668.

The previous prime is 402381319. The next prime is 402381349. The reversal of 402381338 is 833183204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 397483969 + 4897369 = 19937^2 + 2213^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100595333 + ... + 100595336.

Almost surely, 2^402381338 is an apocalyptic number.

402381338 is a deficient number, since it is larger than the sum of its proper divisors (201190672).

402381338 is a wasteful number, since it uses less digits than its factorization.

402381338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201190671.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 402381338 is about 20059.4451069814. The cubic root of 402381338 is about 738.2655617512.

The spelling of 402381338 in words is "four hundred two million, three hundred eighty-one thousand, three hundred thirty-eight".