38828691 has 12 divisors (see below), whose sum is σ = 61184760. Its totient is φ = 23532480.

The previous prime is 38828689. The next prime is 38828707. The reversal of 38828691 is 19682883.

It is not a de Polignac number, because 38828691 - 2¹ = 38828689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38828611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196006 + ... + 196203.

It is an arithmetic number, because the mean of its divisors is an integer number (5098730).

Almost surely, 2^38828691 is an apocalyptic number.

38828691 is a deficient number, since it is larger than the sum of its proper divisors (22356069).

38828691 is a wasteful number, since it uses less digits than its factorization.

38828691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392226 (or 392223 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 38828691 is about 6231.2672065961. The cubic root of 38828691 is about 338.6238812837.

The spelling of 38828691 in words is "thirty-eight million, eight hundred twenty-eight thousand, six hundred ninety-one".