38071640 has 16 divisors (see below), whose sum is σ = 85661280. Its totient is φ = 15228640.

The previous prime is 38071633. The next prime is 38071643. The reversal of 38071640 is 4617083.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38071643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475856 + ... + 475935.

It is an arithmetic number, because the mean of its divisors is an integer number (5353830).

Almost surely, 2^38071640 is an apocalyptic number.

It is an amenable number.

38071640 is an abundant number, since it is smaller than the sum of its proper divisors (47589640).

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

38071640 is a wasteful number, since it uses less digits than its factorization.

38071640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951802 (or 951798 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 38071640 is about 6170.2220381442. Note that the first 3 decimals coincide. The cubic root of 38071640 is about 336.4086816624.

The spelling of 38071640 in words is "thirty-eight million, seventy-one thousand, six hundred forty".