38691138 has 16 divisors (see below), whose sum is σ = 78694560. Its totient is φ = 12678336.

The previous prime is 38691137. The next prime is 38691139. The reversal of 38691138 is 83119683.

It is an interprime number because it is at equal distance from previous prime (38691137) and next prime (38691139).

It is a junction number, because it is equal to n+sod(n) for n = 38691096 and 38691105.

It is not an unprimeable number, because it can be changed into a prime (38691137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54295 + ... + 55002.

It is an arithmetic number, because the mean of its divisors is an integer number (4918410).

Almost surely, 2^38691138 is an apocalyptic number.

38691138 is an abundant number, since it is smaller than the sum of its proper divisors (40003422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38691138 is a wasteful number, since it uses less digits than its factorization.

38691138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109361.

The product of its digits is 31104, while the sum is 39.

The square root of 38691138 is about 6220.2200925691. The cubic root of 38691138 is about 338.2235429367.

The spelling of 38691138 in words is "thirty-eight million, six hundred ninety-one thousand, one hundred thirty-eight".