387870 has 32 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 88608.

The previous prime is 387857. The next prime is 387911. The reversal of 387870 is 78783.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

387870 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2³⁸⁷⁸⁷⁰ is an apocalyptic number.

387870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

387870 is an abundant number, since it is smaller than the sum of its proper divisors (676578).

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

387870 is a wasteful number, since it uses less digits than its factorization.

387870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 387870 is about 622.7921001426. The cubic root of 387870 is about 72.9281835777.

The spelling of 387870 in words is "three hundred eighty-seven thousand, eight hundred seventy".