39638040 has 64 divisors (see below), whose sum is σ = 128066400. Its totient is φ = 9756672.

The previous prime is 39638003. The next prime is 39638069. The reversal of 39638040 is 4083693.

It is a junction number, because it is equal to n+sod(n) for n = 39637992 and 39638010.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11145 + ... + 14264.

Almost surely, 2^39638040 is an apocalyptic number.

39638040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39638040 is an abundant number, since it is smaller than the sum of its proper divisors (88428360).

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

39638040 is a wasteful number, since it uses less digits than its factorization.

39638040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25436 (or 25432 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 39638040 is about 6295.8748399249. The cubic root of 39638040 is about 340.9604905449.

The spelling of 39638040 in words is "thirty-nine million, six hundred thirty-eight thousand, forty".