8638725 has 12 divisors (see below), whose sum is σ = 14282816. Its totient is φ = 4607280.

The previous prime is 8638697. The next prime is 8638727. The reversal of 8638725 is 5278368.

It is not a de Polignac number, because 8638725 - 2⁶ = 8638661 is a prime.

It is a d-powerful number, because it can be written as 8 + 6⁸ + 3¹⁴ + 8³ + 7³ + 2²¹ + 5⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57517 + ... + 57666.

Almost surely, 2^8638725 is an apocalyptic number.

It is an amenable number.

8638725 is a deficient number, since it is larger than the sum of its proper divisors (5644091).

8638725 is a wasteful number, since it uses less digits than its factorization.

8638725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115196 (or 115191 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 8638725 is about 2939.1708014336. The cubic root of 8638725 is about 205.1870194966.

The spelling of 8638725 in words is "eight million, six hundred thirty-eight thousand, seven hundred twenty-five".