40198565 has 16 divisors (see below), whose sum is σ = 52781760. Its totient is φ = 29147520.

The previous prime is 40198519. The next prime is 40198577. The reversal of 40198565 is 56589104.

It is not a de Polignac number, because 40198565 - 2⁸ = 40198309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21602 + ... + 23388.

It is an arithmetic number, because the mean of its divisors is an integer number (3298860).

Almost surely, 2^40198565 is an apocalyptic number.

It is an amenable number.

40198565 is a deficient number, since it is larger than the sum of its proper divisors (12583195).

40198565 is a wasteful number, since it uses less digits than its factorization.

40198565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 40198565 is about 6340.2338284956. The cubic root of 40198565 is about 342.5601577958.

The spelling of 40198565 in words is "forty million, one hundred ninety-eight thousand, five hundred sixty-five".