39748869 has 6 divisors (see below), whose sum is σ = 57415046. Its totient is φ = 26499240.

The previous prime is 39748861. The next prime is 39748871. The reversal of 39748869 is 96884793.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 18818244 = 4575^2 + 4338^2 .

It is not a de Polignac number, because 39748869 - 2³ = 39748861 is a prime.

It is a super-2 number, since 2×39748869² = 3159945173558322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39748861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2208262 + ... + 2208279.

Almost surely, 2^39748869 is an apocalyptic number.

It is an amenable number.

39748869 is a deficient number, since it is larger than the sum of its proper divisors (17666177).

39748869 is a wasteful number, since it uses less digits than its factorization.

39748869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416547 (or 4416544 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 39748869 is about 6304.6704116869. The cubic root of 39748869 is about 341.2779729917.

The spelling of 39748869 in words is "thirty-nine million, seven hundred forty-eight thousand, eight hundred sixty-nine".