38730431 has 4 divisors (see below), whose sum is σ = 38745000. Its totient is φ = 38715864.

The previous prime is 38730427. The next prime is 38730463. The reversal of 38730431 is 13403783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13403783 = 107 ⋅125269.

It is a cyclic number.

It is not a de Polignac number, because 38730431 - 2² = 38730427 is a prime.

It is a super-2 number, since 2×38730431² = 3000092570891522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38730394 and 38730403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38730421) 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, 2036 + ... + 9033.

It is an arithmetic number, because the mean of its divisors is an integer number (9686250).

Almost surely, 2^38730431 is an apocalyptic number.

38730431 is a deficient number, since it is larger than the sum of its proper divisors (14569).

38730431 is a wasteful number, since it uses less digits than its factorization.

38730431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14568.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 38730431 is about 6223.3777805947. The cubic root of 38730431 is about 338.3379991322.

The spelling of 38730431 in words is "thirty-eight million, seven hundred thirty thousand, four hundred thirty-one".