38909928 has 32 divisors (see below), whose sum is σ = 101505600. Its totient is φ = 12405888.

The previous prime is 38909921. The next prime is 38909963. The reversal of 38909928 is 82990983.

It is not an unprimeable number, because it can be changed into a prime (38909921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34693 + ... + 35796.

It is an arithmetic number, because the mean of its divisors is an integer number (3172050).

Almost surely, 2^38909928 is an apocalyptic number.

It is an amenable number.

38909928 is an abundant number, since it is smaller than the sum of its proper divisors (62595672).

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

38909928 is a wasteful number, since it uses less digits than its factorization.

38909928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70521 (or 70517 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 38909928 is about 6237.7822982211. The cubic root of 38909928 is about 338.8598719499.

The spelling of 38909928 in words is "thirty-eight million, nine hundred nine thousand, nine hundred twenty-eight".