39975725 has 24 divisors (see below), whose sum is σ = 53151360.
Its totient is φ = 29747520.
The previous prime is 39975713. The next prime is 39975739. The reversal of 39975725 is 52757993.
It is not a de Polignac number, because 39975725 - 28 = 39975469 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 39975725.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20336 + ... + 22214.
It is an arithmetic number, because the mean of its divisors is an integer number (2214640).
Almost surely, 239975725 is an apocalyptic number.
It is an amenable number.
39975725 is a deficient number, since it is larger than the sum of its proper divisors (13175635).
39975725 is a wasteful number, since it uses less digits than its factorization.
39975725 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1949 (or 1944 counting only the distinct ones).
The product of its digits is 595350, while the sum is 47.
The square root of 39975725 is about 6322.6359218288.
The cubic root of 39975725 is about 341.9259925587.
The spelling of 39975725 in words is "thirty-nine million, nine hundred seventy-five thousand, seven hundred twenty-five".