38949138 has 18 divisors (see below), whose sum is σ = 84447207. Its totient is φ = 12974220.

The previous prime is 38949103. The next prime is 38949149. The reversal of 38949138 is 83194983.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 19474569 = 4413^2 + 4413^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4413.

It is a junction number, because it is equal to n+sod(n) for n = 38949093 and 38949102.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25743 + ... + 27213.

Almost surely, 2^38949138 is an apocalyptic number.

38949138 is an abundant number, since it is smaller than the sum of its proper divisors (45498069).

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

38949138 is an equidigital number, since it uses as much as digits as its factorization.

38949138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950 (or 1476 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 38949138 is about 6240.9244507525. The cubic root of 38949138 is about 338.9736581197.

The spelling of 38949138 in words is "thirty-eight million, nine hundred forty-nine thousand, one hundred thirty-eight".