38691099 has 24 divisors (see below), whose sum is σ = 60561072. Its totient is φ = 23708160.

The previous prime is 38691091. The next prime is 38691127. The reversal of 38691099 is 99019683.

It is not a de Polignac number, because 38691099 - 2³ = 38691091 is a prime.

It is a super-2 number, since 2×38691099² = 2994002283655602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38691091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3639 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (2523378).

Almost surely, 2^38691099 is an apocalyptic number.

38691099 is a deficient number, since it is larger than the sum of its proper divisors (21869973).

38691099 is a wasteful number, since it uses less digits than its factorization.

38691099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5947 (or 5944 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 38691099 is about 6220.2169576310. The cubic root of 38691099 is about 338.2234292955.

The spelling of 38691099 in words is "thirty-eight million, six hundred ninety-one thousand, ninety-nine".