1438973381 has 8 divisors (see below), whose sum is σ = 1524407040. Its totient is φ = 1353627328.

The previous prime is 1438973339. The next prime is 1438973383. The reversal of 1438973381 is 1833798341.

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

It is a cyclic number.

It is not a de Polignac number, because 1438973381 - 2⁶ = 1438973317 is a prime.

It is a super-2 number, since 2×1438973381² = 4141288782453142322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438973383) 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, 13580 + ... + 55338.

It is an arithmetic number, because the mean of its divisors is an integer number (190550880).

Almost surely, 2^1438973381 is an apocalyptic number.

It is an amenable number.

1438973381 is a deficient number, since it is larger than the sum of its proper divisors (85433659).

1438973381 is a wasteful number, since it uses less digits than its factorization.

1438973381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43803.

The product of its digits is 435456, while the sum is 47.

The square root of 1438973381 is about 37933.8026171909. The cubic root of 1438973381 is about 1128.9748137846.

The spelling of 1438973381 in words is "one billion, four hundred thirty-eight million, nine hundred seventy-three thousand, three hundred eighty-one".