38684989225 has 27 divisors (see below), whose sum is σ = 48488307543. Its totient is φ = 30616773840.

The previous prime is 38684989201. The next prime is 38684989241. The reversal of 38684989225 is 52298948683.

The square root of 38684989225 is 196685.

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., 13926596121 + 24758393104 = 118011^2 + 157348^2 .

It is not a de Polignac number, because 38684989225 - 2⁷ = 38684989097 is a prime.

It is a super-2 number, since 2×38684989225² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 136695934 + ... + 136696216.

Almost surely, 2^38684989225 is an apocalyptic number.

38684989225 is the 196685-th square number.

38684989225 is the 98343-rd centered octagonal number.

It is an amenable number.

38684989225 is a deficient number, since it is larger than the sum of its proper divisors (9803318318).

38684989225 is an frugal number, since it uses more digits than its factorization.

38684989225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 427 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 64.

Multiplying 38684989225 by its sum of digits (64), we get a square (2475839310400 = 1573480²).

The spelling of 38684989225 in words is "thirty-eight billion, six hundred eighty-four million, nine hundred eighty-nine thousand, two hundred twenty-five".