38181442 has 8 divisors (see below), whose sum is σ = 61677756. Its totient is φ = 17622192.

The previous prime is 38181433. The next prime is 38181443. The reversal of 38181442 is 24418183.

It can be written as a sum of positive squares in 2 ways, for example, as 31259281 + 6922161 = 5591^2 + 2631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (38181443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734233 + ... + 734284.

Almost surely, 2^38181442 is an apocalyptic number.

38181442 is a deficient number, since it is larger than the sum of its proper divisors (23496314).

38181442 is a wasteful number, since it uses less digits than its factorization.

38181442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468532.

The product of its digits is 6144, while the sum is 31.

The square root of 38181442 is about 6179.1133668189. The cubic root of 38181442 is about 336.7317821093.

The spelling of 38181442 in words is "thirty-eight million, one hundred eighty-one thousand, four hundred forty-two".