387143994 has 8 divisors (see below), whose sum is σ = 774288000. Its totient is φ = 129047996.

The previous prime is 387143983. The next prime is 387144011. The reversal of 387143994 is 499341783.

It is a happy number.

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

387143994 is an admirable number.

It is a super-3 number, since 3×387143994³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32261994 + ... + 32262005.

It is an arithmetic number, because the mean of its divisors is an integer number (96786000).

Almost surely, 2^387143994 is an apocalyptic number.

387143994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

387143994 is a wasteful number, since it uses less digits than its factorization.

387143994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64524004.

The product of its digits is 653184, while the sum is 48.

The square root of 387143994 is about 19675.9750457252. The cubic root of 387143994 is about 728.8265340194.

The spelling of 387143994 in words is "three hundred eighty-seven million, one hundred forty-three thousand, nine hundred ninety-four".