386989747225 has 27 divisors (see below), whose sum is σ = 486042721663. Its totient is φ = 305657732240.

The previous prime is 386989747219. The next prime is 386989747229. The reversal of 386989747225 is 522747989683.

The square root of 386989747225 is 622085.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 139316309001 + 247673438224 = 373251^2 + 497668^2 .

It is not a de Polignac number, because 386989747225 - 2¹³ = 386989739033 is a prime.

It is a super-2 number, since 2×386989747225² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386989747229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 258164526 + ... + 258166024.

Almost surely, 2^386989747225 is an apocalyptic number.

386989747225 is the 622085-th square number.

386989747225 is the 311043-rd centered octagonal number.

It is an amenable number.

386989747225 is a deficient number, since it is larger than the sum of its proper divisors (99052974438).

386989747225 is an frugal number, since it uses more digits than its factorization.

386989747225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174 (or 1587 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 70.

The spelling of 386989747225 in words is "three hundred eighty-six billion, nine hundred eighty-nine million, seven hundred forty-seven thousand, two hundred twenty-five".