388794845 has 16 divisors (see below), whose sum is σ = 494479728. Its totient is φ = 292454400.

The previous prime is 388794827. The next prime is 388794869. The reversal of 388794845 is 548497883.

It can be written as a sum of positive squares in 8 ways, for example, as 100440484 + 288354361 = 10022^2 + 16981^2 .

It is not a de Polignac number, because 388794845 - 2⁶ = 388794781 is a prime.

It is a super-2 number, since 2×388794845² = 302322862997148050, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (7741440) is a multiple of the sum of its prime divisors (4480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134657 + ... + 137513.

It is an arithmetic number, because the mean of its divisors is an integer number (30904983).

Almost surely, 2^388794845 is an apocalyptic number.

It is an amenable number.

388794845 is a deficient number, since it is larger than the sum of its proper divisors (105684883).

388794845 is a wasteful number, since it uses less digits than its factorization.

388794845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480.

The product of its digits is 7741440, while the sum is 56.

The square root of 388794845 is about 19717.8813517071. The cubic root of 388794845 is about 729.8610137600.

The spelling of 388794845 in words is "three hundred eighty-eight million, seven hundred ninety-four thousand, eight hundred forty-five".