38219381 has 4 divisors (see below), whose sum is σ = 38511264. Its totient is φ = 37927500.

The previous prime is 38219327. The next prime is 38219407. The reversal of 38219381 is 18391283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18391283 = 23 ⋅799621.

It is a cyclic number.

It is not a de Polignac number, because 38219381 - 2²² = 34025077 is a prime.

It is a super-2 number, since 2×38219381² = 2921442168046322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38219981) 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, 145745 + ... + 146006.

It is an arithmetic number, because the mean of its divisors is an integer number (9627816).

Almost surely, 2^38219381 is an apocalyptic number.

It is an amenable number.

38219381 is a deficient number, since it is larger than the sum of its proper divisors (291883).

38219381 is a wasteful number, since it uses less digits than its factorization.

38219381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291882.

The product of its digits is 10368, while the sum is 35.

The square root of 38219381 is about 6182.1825434065. The cubic root of 38219381 is about 336.8432763970.

The spelling of 38219381 in words is "thirty-eight million, two hundred nineteen thousand, three hundred eighty-one".