1986039225 has 27 divisors (see below), whose sum is σ = 3558414639. Its totient is φ = 1058864400.

The previous prime is 1986039199. The next prime is 1986039233. The reversal of 1986039225 is 5229306891.

The square root of 1986039225 is 44565.

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

1986039225 is a `hidden beast` number, since 19 + 8 + 603 + 9 + 2 + 25 = 666.

1986039225 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 714974121 + 1271065104 = 26739^2 + 35652^2 .

It is not a de Polignac number, because 1986039225 - 2⁹ = 1986038713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 666990 + ... + 669960.

Almost surely, 2^1986039225 is an apocalyptic number.

1986039225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1986039225 is the 44565-th square number.

1986039225 is the 22283-rd centered octagonal number.

It is an amenable number.

1986039225 is a deficient number, since it is larger than the sum of its proper divisors (1572375414).

1986039225 is an frugal number, since it uses more digits than its factorization.

1986039225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The cubic root of 1986039225 is about 1256.9826230835.

The spelling of 1986039225 in words is "one billion, nine hundred eighty-six million, thirty-nine thousand, two hundred twenty-five".