389213370045 has 18 divisors (see below), whose sum is σ = 674643762234. Its totient is φ = 207578232000.

The previous prime is 389213370011. The next prime is 389213370053. The reversal of 389213370045 is 540073312983.

It can be written as a sum of positive squares in 3 ways, for example, as 165784151556 + 223429218489 = 407166^2 + 472683^2 .

It is not a de Polignac number, because 389213370045 - 2¹³ = 389213361853 is a prime.

It is a super-2 number, since 2×389213370045² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4138545 + ... + 4231545.

It is an arithmetic number, because the mean of its divisors is an integer number (37480209013).

Almost surely, 2^389213370045 is an apocalyptic number.

It is an amenable number.

389213370045 is a deficient number, since it is larger than the sum of its proper divisors (285430392189).

389213370045 is an frugal number, since it uses more digits than its factorization.

389213370045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186013 (or 93009 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

Multiplying 389213370045 by its sum of digits (45), we get a square (17514601652025 = 4185045²).

389213370045 divided by its sum of digits (45) gives a square (8649186001 = 93001²).

The spelling of 389213370045 in words is "three hundred eighty-nine billion, two hundred thirteen million, three hundred seventy thousand, forty-five".