40198385 has 4 divisors (see below), whose sum is σ = 48238068. Its totient is φ = 32158704.

The previous prime is 40198381. The next prime is 40198393. The reversal of 40198385 is 58389104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18258529 + 21939856 = 4273^2 + 4684^2 .

It is a cyclic number.

It is not a de Polignac number, because 40198385 - 2² = 40198381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40198381) 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, 4019834 + ... + 4019843.

It is an arithmetic number, because the mean of its divisors is an integer number (12059517).

Almost surely, 2^40198385 is an apocalyptic number.

It is an amenable number.

40198385 is a deficient number, since it is larger than the sum of its proper divisors (8039683).

40198385 is an equidigital number, since it uses as much as digits as its factorization.

40198385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039682.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 40198385 is about 6340.2196334196. The cubic root of 40198385 is about 342.5596464930.

The spelling of 40198385 in words is "forty million, one hundred ninety-eight thousand, three hundred eighty-five".