39138648 has 16 divisors (see below), whose sum is σ = 97846680. Its totient is φ = 13046208.

The previous prime is 39138629. The next prime is 39138667. The reversal of 39138648 is 84683193.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39138629) and next prime (39138667).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815365 + ... + 815412.

Almost surely, 2^39138648 is an apocalyptic number.

It is an amenable number.

39138648 is an abundant number, since it is smaller than the sum of its proper divisors (58708032).

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

39138648 is a wasteful number, since it uses less digits than its factorization.

39138648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630786 (or 1630782 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 39138648 is about 6256.0888740490. The cubic root of 39138648 is about 339.5225362682.

It can be divided in two parts, 3913 and 8648, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 39138648 in words is "thirty-nine million, one hundred thirty-eight thousand, six hundred forty-eight".