387422406 has 64 divisors (see below), whose sum is σ = 993062400. Its totient is φ = 109664928.

The previous prime is 387422383. The next prime is 387422417. The reversal of 387422406 is 604224783.

It is a super-2 number, since 2×387422406² = 300192241341657672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36501 + ... + 45903.

It is an arithmetic number, because the mean of its divisors is an integer number (15516600).

Almost surely, 2^387422406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387422406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496531200).

387422406 is an abundant number, since it is smaller than the sum of its proper divisors (605639994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

387422406 is a wasteful number, since it uses less digits than its factorization.

387422406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9530 (or 9524 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 387422406 is about 19683.0486967848. The cubic root of 387422406 is about 729.0012023893.

The spelling of 387422406 in words is "three hundred eighty-seven million, four hundred twenty-two thousand, four hundred six".