400408382 has 16 divisors (see below), whose sum is σ = 655992432. Its totient is φ = 181787520.

The previous prime is 400408373. The next prime is 400408387. The reversal of 400408382 is 283804004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400408387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8918 + ... + 29670.

It is an arithmetic number, because the mean of its divisors is an integer number (40999527).

Almost surely, 2^400408382 is an apocalyptic number.

400408382 is a deficient number, since it is larger than the sum of its proper divisors (255584050).

400408382 is a wasteful number, since it uses less digits than its factorization.

400408382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21643.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 400408382 is about 20010.2069454566. The cubic root of 400408382 is about 737.0569631340.

The spelling of 400408382 in words is "four hundred million, four hundred eight thousand, three hundred eighty-two".