402381406 has 16 divisors (see below), whose sum is σ = 702813024. Its totient is φ = 169195104.

The previous prime is 402381367. The next prime is 402381407. The reversal of 402381406 is 604183204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402381407) 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, 270405 + ... + 271888.

It is an arithmetic number, because the mean of its divisors is an integer number (43925814).

Almost surely, 2^402381406 is an apocalyptic number.

402381406 is a deficient number, since it is larger than the sum of its proper divisors (300431618).

402381406 is a wasteful number, since it uses less digits than its factorization.

402381406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542355.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 402381406 is about 20059.4468019435. The cubic root of 402381406 is about 738.2656033387.

The spelling of 402381406 in words is "four hundred two million, three hundred eighty-one thousand, four hundred six".