387940 has 48 divisors (see below), whose sum is σ = 991872. Its totient is φ = 124416.

The previous prime is 387917. The next prime is 387953. The reversal of 387940 is 49783.

387940 = T₅₁ + T₅₂ + ... + T₁₃₄.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2299 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (20664).

2³⁸⁷⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495936).

387940 is an abundant number, since it is smaller than the sum of its proper divisors (603932).

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

387940 is a wasteful number, since it uses less digits than its factorization.

387940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 387940 is about 622.8482961364. The cubic root of 387940 is about 72.9325704992.

The spelling of 387940 in words is "three hundred eighty-seven thousand, nine hundred forty".