39749142 has 16 divisors (see below), whose sum is σ = 80271360. Its totient is φ = 13120872.

The previous prime is 39749117. The next prime is 39749147. The reversal of 39749142 is 24194793.

It is a self number, because there is not a number n which added to its sum of digits gives 39749142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39749147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31542 + ... + 32777.

It is an arithmetic number, because the mean of its divisors is an integer number (5016960).

Almost surely, 2^39749142 is an apocalyptic number.

39749142 is an abundant number, since it is smaller than the sum of its proper divisors (40522218).

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

39749142 is a wasteful number, since it uses less digits than its factorization.

39749142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64427.

The product of its digits is 54432, while the sum is 39.

The square root of 39749142 is about 6304.6920622660. The cubic root of 39749142 is about 341.2787543026.

The spelling of 39749142 in words is "thirty-nine million, seven hundred forty-nine thousand, one hundred forty-two".