38181942 has 40 divisors (see below), whose sum is σ = 87189696. Its totient is φ = 12484368.

The previous prime is 38181919. The next prime is 38181959. The reversal of 38181942 is 24918183.

It is a junction number, because it is equal to n+sod(n) for n = 38181897 and 38181906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6363 + ... + 10809.

Almost surely, 2^38181942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38181942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43594848).

38181942 is an abundant number, since it is smaller than the sum of its proper divisors (49007754).

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

38181942 is a wasteful number, since it uses less digits than its factorization.

38181942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514 (or 4505 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 38181942 is about 6179.1538255654. The cubic root of 38181942 is about 336.7332519783.

The spelling of 38181942 in words is "thirty-eight million, one hundred eighty-one thousand, nine hundred forty-two".