39982725 has 36 divisors (see below), whose sum is σ = 75833316. Its totient is φ = 20067840.

The previous prime is 39982699. The next prime is 39982729. The reversal of 39982725 is 52728993.

It can be written as a sum of positive squares in 6 ways, for example, as 4198401 + 35784324 = 2049^2 + 5982^2 .

It is not a de Polignac number, because 39982725 - 2⁶ = 39982661 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39982729) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1402 + ... + 9051.

It is an arithmetic number, because the mean of its divisors is an integer number (2106481).

Almost surely, 2^39982725 is an apocalyptic number.

It is an amenable number.

39982725 is a deficient number, since it is larger than the sum of its proper divisors (35850591).

39982725 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (39982724) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (10486).

39982725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10486 (or 10478 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 39982725 is about 6323.1894641866. The cubic root of 39982725 is about 341.9459491887.

The spelling of 39982725 in words is "thirty-nine million, nine hundred eighty-two thousand, seven hundred twenty-five".