38788691 has 4 divisors (see below), whose sum is σ = 39837072. Its totient is φ = 37740312.

The previous prime is 38788663. The next prime is 38788693. The reversal of 38788691 is 19688783.

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: 19688783 = 2287 ⋅8609.

It is a cyclic number.

It is not a de Polignac number, because 38788691 - 2⁶ = 38788627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38788693) 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, 524135 + ... + 524208.

It is an arithmetic number, because the mean of its divisors is an integer number (9959268).

Almost surely, 2^38788691 is an apocalyptic number.

38788691 is a deficient number, since it is larger than the sum of its proper divisors (1048381).

38788691 is a wasteful number, since it uses less digits than its factorization.

38788691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048380.

The product of its digits is 580608, while the sum is 50.

The square root of 38788691 is about 6228.0567595358. The cubic root of 38788691 is about 338.5075617208.

The spelling of 38788691 in words is "thirty-eight million, seven hundred eighty-eight thousand, six hundred ninety-one".