38278140 has 48 divisors (see below), whose sum is σ = 108300192. Its totient is φ = 10100736.

The previous prime is 38278139. The next prime is 38278151. The reversal of 38278140 is 4187283.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2532 + ... + 9108.

It is an arithmetic number, because the mean of its divisors is an integer number (2256254).

Almost surely, 2^38278140 is an apocalyptic number.

38278140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38278140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54150096).

38278140 is an abundant number, since it is smaller than the sum of its proper divisors (70022052).

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

38278140 is a wasteful number, since it uses less digits than its factorization.

38278140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686 (or 6684 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 38278140 is about 6186.9330043245. The cubic root of 38278140 is about 337.0158104978.

The spelling of 38278140 in words is "thirty-eight million, two hundred seventy-eight thousand, one hundred forty".