38139378 has 16 divisors (see below), whose sum is σ = 78340800. Its totient is φ = 12369456.

The previous prime is 38139373. The next prime is 38139391. The reversal of 38139378 is 87393183.

It is a super-2 number, since 2×38139378² = 2909224308453768, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38139373) 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, 85678 + ... + 86121.

It is an arithmetic number, because the mean of its divisors is an integer number (4896300).

Almost surely, 2^38139378 is an apocalyptic number.

38139378 is an abundant number, since it is smaller than the sum of its proper divisors (40201422).

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

38139378 is a wasteful number, since it uses less digits than its factorization.

38139378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171841.

The product of its digits is 108864, while the sum is 42.

The square root of 38139378 is about 6175.7087042703. The cubic root of 38139378 is about 336.6080789902.

The spelling of 38139378 in words is "thirty-eight million, one hundred thirty-nine thousand, three hundred seventy-eight".