388745 has 16 divisors (see below), whose sum is σ = 552960. Its totient is φ = 256704.

The previous prime is 388727. The next prime is 388757. The reversal of 388745 is 547883.

It is not a de Polignac number, because 388745 - 2⁸ = 388489 is a prime.

It is a super-2 number, since 2×388745² = 302245350050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a d-powerful number, because it can be written as 3¹¹ + 8⁵ + 7⁴ + 8⁵ + 4⁸ + 5⁷ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 824 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2³⁸⁸⁷⁴⁵ is an apocalyptic number.

388745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

388745 is a deficient number, since it is larger than the sum of its proper divisors (164215).

388745 is a wasteful number, since it uses less digits than its factorization.

388745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424.

The product of its digits is 26880, while the sum is 35.

The square root of 388745 is about 623.4941860194. The cubic root of 388745 is about 72.9829822094.

The spelling of 388745 in words is "three hundred eighty-eight thousand, seven hundred forty-five".