38428923 has 16 divisors (see below), whose sum is σ = 55429920. Its totient is φ = 23541504.

The previous prime is 38428919. The next prime is 38428961. The reversal of 38428923 is 32982483.

38428923 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 38428923 - 2² = 38428919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (38428223) 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 15 ways as a sum of consecutive naturals, for example, 6973 + ... + 11201.

It is an arithmetic number, because the mean of its divisors is an integer number (3464370).

Almost surely, 2^38428923 is an apocalyptic number.

38428923 is a deficient number, since it is larger than the sum of its proper divisors (17000997).

38428923 is a wasteful number, since it uses less digits than its factorization.

38428923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478.

The product of its digits is 82944, while the sum is 39.

The square root of 38428923 is about 6199.1066291846. The cubic root of 38428923 is about 337.4577483458.

The spelling of 38428923 in words is "thirty-eight million, four hundred twenty-eight thousand, nine hundred twenty-three".