387780 has 48 divisors (see below), whose sum is σ = 1137024. Its totient is φ = 98560.

The previous prime is 387763. The next prime is 387781. The reversal of 387780 is 87783.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 387780.

It is not an unprimeable number, because it can be changed into a prime (387781) by changing a digit.

387780 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, 1240 + ... + 1520.

It is an arithmetic number, because the mean of its divisors is an integer number (23688).

2³⁸⁷⁷⁸⁰ is an apocalyptic number.

387780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568512).

387780 is an abundant number, since it is smaller than the sum of its proper divisors (749244).

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

387780 is a wasteful number, since it uses less digits than its factorization.

387780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

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

The square root of 387780 is about 622.7198406988. The cubic root of 387780 is about 72.9225424743.

The spelling of 387780 in words is "three hundred eighty-seven thousand, seven hundred eighty".