388681225 has 9 divisors (see below), whose sum is σ = 482086983. Its totient is φ = 310866120.

The previous prime is 388681219. The next prime is 388681253. The reversal of 388681225 is 522186883.

The square root of 388681225 is 19715.

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., 139925241 + 248755984 = 11829^2 + 15772^2 .

It is not a de Polignac number, because 388681225 - 2⁹ = 388680713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 96604 + ... + 100546.

Almost surely, 2^388681225 is an apocalyptic number.

388681225 is the 19715-th square number.

388681225 is the 9858-th centered octagonal number.

It is an amenable number.

388681225 is a deficient number, since it is larger than the sum of its proper divisors (93405758).

388681225 is an frugal number, since it uses more digits than its factorization.

388681225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896 (or 3948 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The cubic root of 388681225 is about 729.7899095184.

The spelling of 388681225 in words is "three hundred eighty-eight million, six hundred eighty-one thousand, two hundred twenty-five".