39725172 has 54 divisors (see below), whose sum is σ = 102469458. Its totient is φ = 12976224.

The previous prime is 39725149. The next prime is 39725177. The reversal of 39725172 is 27152793.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 15163236 = 4956^2 + 3894^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39725177) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 125158 + ... + 125474.

Almost surely, 2^39725172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39725172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51234729).

39725172 is an abundant number, since it is smaller than the sum of its proper divisors (62744286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39725172 is a wasteful number, since it uses less digits than its factorization.

39725172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 381 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 39725172 is about 6302.7908104268. The cubic root of 39725172 is about 341.2101398518.

The spelling of 39725172 in words is "thirty-nine million, seven hundred twenty-five thousand, one hundred seventy-two".