400137382 has 8 divisors (see below), whose sum is σ = 608428296. Its totient is φ = 197327952.

The previous prime is 400137377. The next prime is 400137431. The reversal of 400137382 is 283731004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 400137382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370188 + ... + 1370479.

It is an arithmetic number, because the mean of its divisors is an integer number (76053537).

Almost surely, 2^400137382 is an apocalyptic number.

400137382 is a deficient number, since it is larger than the sum of its proper divisors (208290914).

400137382 is a wasteful number, since it uses less digits than its factorization.

400137382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740742.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 400137382 is about 20003.4342551473. The cubic root of 400137382 is about 736.8906433420.

Adding to 400137382 its reverse (283731004), we get a palindrome (683868386).

The spelling of 400137382 in words is "four hundred million, one hundred thirty-seven thousand, three hundred eighty-two".