39749388 has 36 divisors (see below), whose sum is σ = 107892792. Its totient is φ = 11356800.

The previous prime is 39749371. The next prime is 39749389. The reversal of 39749388 is 88394793.

It is a self number, because there is not a number n which added to its sum of digits gives 39749388.

It is not an unprimeable number, because it can be changed into a prime (39749389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33213 + ... + 34388.

It is an arithmetic number, because the mean of its divisors is an integer number (2997022).

Almost surely, 2^39749388 is an apocalyptic number.

It is an amenable number.

39749388 is an abundant number, since it is smaller than the sum of its proper divisors (68143404).

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

39749388 is a wasteful number, since it uses less digits than its factorization.

39749388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67622 (or 67613 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 39749388 is about 6304.7115715154. The cubic root of 39749388 is about 341.2794583379.

The spelling of 39749388 in words is "thirty-nine million, seven hundred forty-nine thousand, three hundred eighty-eight".