38389640 has 32 divisors (see below), whose sum is σ = 86941080. Its totient is φ = 15255552.

The previous prime is 38389627. The next prime is 38389643. The reversal of 38389640 is 4698383.

It can be written as a sum of positive squares in 4 ways, for example, as 28111204 + 10278436 = 5302^2 + 3206^2 .

It is not an unprimeable number, because it can be changed into a prime (38389643) 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 7 ways as a sum of consecutive naturals, for example, 3224 + ... + 9336.

Almost surely, 2^38389640 is an apocalyptic number.

It is an amenable number.

38389640 is an abundant number, since it is smaller than the sum of its proper divisors (48551440).

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

38389640 is a wasteful number, since it uses less digits than its factorization.

38389640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281 (or 6277 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 38389640 is about 6195.9373786377. The cubic root of 38389640 is about 337.3427232445.

The spelling of 38389640 in words is "thirty-eight million, three hundred eighty-nine thousand, six hundred forty".