387686900 has 18 divisors (see below), whose sum is σ = 841280790. Its totient is φ = 155074720.

The previous prime is 387686881. The next prime is 387686917. The reversal of 387686900 is 9686783.

It can be written as a sum of positive squares in 3 ways, for example, as 4545424 + 383141476 = 2132^2 + 19574^2 .

It is a super-2 number, since 2×387686900² = 300602264863220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1938335 + ... + 1938534.

Almost surely, 2^387686900 is an apocalyptic number.

It is an amenable number.

387686900 is an abundant number, since it is smaller than the sum of its proper divisors (453593890).

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

387686900 is a wasteful number, since it uses less digits than its factorization.

387686900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876883 (or 3876876 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 387686900 is about 19689.7663774866. The cubic root of 387686900 is about 729.1670614782.

The spelling of 387686900 in words is "three hundred eighty-seven million, six hundred eighty-six thousand, nine hundred".