38640789 has 48 divisors (see below), whose sum is σ = 64658880. Its totient is φ = 22014720.

The previous prime is 38640769. The next prime is 38640793. The reversal of 38640789 is 98704683.

It is a happy number.

38640789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38640789 - 2¹² = 38636693 is a prime.

It is a super-2 number, since 2×38640789² = 2986221149085042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38640769) 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 47 ways as a sum of consecutive naturals, for example, 123297 + ... + 123609.

It is an arithmetic number, because the mean of its divisors is an integer number (1347060).

Almost surely, 2^38640789 is an apocalyptic number.

It is an amenable number.

38640789 is a deficient number, since it is larger than the sum of its proper divisors (26018091).

38640789 is a wasteful number, since it uses less digits than its factorization.

38640789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 38640789 is about 6216.1715709913. The cubic root of 38640789 is about 338.0767685061.

The spelling of 38640789 in words is "thirty-eight million, six hundred forty thousand, seven hundred eighty-nine".