387705750 has 64 divisors (see below), whose sum is σ = 974937600. Its totient is φ = 102616800.

The previous prime is 387705739. The next prime is 387705763. The reversal of 387705750 is 57507783.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102391 + ... + 106109.

It is an arithmetic number, because the mean of its divisors is an integer number (15233400).

Almost surely, 2^387705750 is an apocalyptic number.

387705750 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 387705750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487468800).

387705750 is an abundant number, since it is smaller than the sum of its proper divisors (587231850).

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

387705750 is a wasteful number, since it uses less digits than its factorization.

387705750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878 (or 3868 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The square root of 387705750 is about 19690.2450467230. The cubic root of 387705750 is about 729.1788790698.

The spelling of 387705750 in words is "three hundred eighty-seven million, seven hundred five thousand, seven hundred fifty".