38091640 has 16 divisors (see below), whose sum is σ = 85706280. Its totient is φ = 15236640.

The previous prime is 38091623. The next prime is 38091649. The reversal of 38091640 is 4619083.

38091640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38091649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476106 + ... + 476185.

Almost surely, 2^38091640 is an apocalyptic number.

It is an amenable number.

38091640 is an abundant number, since it is smaller than the sum of its proper divisors (47614640).

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

38091640 is a wasteful number, since it uses less digits than its factorization.

38091640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952302 (or 952298 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 38091640 is about 6171.8425125727. The cubic root of 38091640 is about 336.4675793600.

The spelling of 38091640 in words is "thirty-eight million, ninety-one thousand, six hundred forty".