39742452 has 72 divisors (see below), whose sum is σ = 107016000. Its totient is φ = 12400128.

The previous prime is 39742399. The next prime is 39742453. The reversal of 39742452 is 25424793.

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

Its product of digits (60480) is a multiple of the sum of its prime divisors (720).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39742453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66049 + ... + 66647.

Almost surely, 2^39742452 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 39742452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53508000).

39742452 is an abundant number, since it is smaller than the sum of its proper divisors (67273548).

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

39742452 is a wasteful number, since it uses less digits than its factorization.

39742452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 720 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 39742452 is about 6304.1614827033. The cubic root of 39742452 is about 341.2596068623.

It can be divided in two parts, 397 and 42452, that added together give a square (42849 = 207²).

The spelling of 39742452 in words is "thirty-nine million, seven hundred forty-two thousand, four hundred fifty-two".