38664427 has 4 divisors (see below), whose sum is σ = 39241576. Its totient is φ = 38087280.

The previous prime is 38664421. The next prime is 38664463. The reversal of 38664427 is 72446683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72446683 = 3517 ⋅20599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38664427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38664427.

It is not an unprimeable number, because it can be changed into a prime (38664421) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288474 + ... + 288607.

It is an arithmetic number, because the mean of its divisors is an integer number (9810394).

Almost surely, 2^38664427 is an apocalyptic number.

38664427 is a deficient number, since it is larger than the sum of its proper divisors (577149).

38664427 is an equidigital number, since it uses as much as digits as its factorization.

38664427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577148.

The product of its digits is 193536, while the sum is 40.

The square root of 38664427 is about 6218.0726113483. The cubic root of 38664427 is about 338.1456924753.

The spelling of 38664427 in words is "thirty-eight million, six hundred sixty-four thousand, four hundred twenty-seven".