387499225 has 27 divisors (see below), whose sum is σ = 500439231. Its totient is φ = 297637200.

The previous prime is 387499219. The next prime is 387499253. The reversal of 387499225 is 522994783.

The square root of 387499225 is 19685.

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., 139499721 + 247999504 = 11811^2 + 15748^2 .

It is not a de Polignac number, because 387499225 - 2⁷ = 387499097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3051112 + ... + 3051238.

Almost surely, 2^387499225 is an apocalyptic number.

387499225 is the 19685-th square number.

387499225 is the 9843-rd centered octagonal number.

It is an amenable number.

387499225 is a deficient number, since it is larger than the sum of its proper divisors (112940006).

387499225 is an equidigital number, since it uses as much as digits as its factorization.

387499225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 163 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The cubic root of 387499225 is about 729.0493818798.

Multiplying 387499225 by its sum of digits (49), we get a square (18987462025 = 137795²).

It can be divided in two parts, 38749 and 9225, that added together give a palindrome (47974).

The spelling of 387499225 in words is "three hundred eighty-seven million, four hundred ninety-nine thousand, two hundred twenty-five".