38640198 has 16 divisors (see below), whose sum is σ = 79773696. Its totient is φ = 12464520.

The previous prime is 38640197. The next prime is 38640211. The reversal of 38640198 is 89104683.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38640191) 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, 103686 + ... + 104057.

It is an arithmetic number, because the mean of its divisors is an integer number (4985856).

Almost surely, 2^38640198 is an apocalyptic number.

38640198 is an abundant number, since it is smaller than the sum of its proper divisors (41133498).

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

38640198 is a wasteful number, since it uses less digits than its factorization.

38640198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207779.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 38640198 is about 6216.1240335116. The cubic root of 38640198 is about 338.0750449010.

The spelling of 38640198 in words is "thirty-eight million, six hundred forty thousand, one hundred ninety-eight".