387747840 has 104 divisors (see below), whose sum is σ = 1240838208. Its totient is φ = 103383040.

The previous prime is 387747797. The next prime is 387747847. The reversal of 387747840 is 48747783.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 387747840.

It is not an unprimeable number, because it can be changed into a prime (387747847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58285 + ... + 64595.

Almost surely, 2^387747840 is an apocalyptic number.

387747840 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 387747840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620419104).

387747840 is an abundant number, since it is smaller than the sum of its proper divisors (853090368).

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

387747840 is an equidigital number, since it uses as much as digits as its factorization.

387747840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343 (or 6321 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 48.

The square root of 387747840 is about 19691.3138210735. The cubic root of 387747840 is about 729.2052650842.

The spelling of 387747840 in words is "three hundred eighty-seven million, seven hundred forty-seven thousand, eight hundred forty".