40782197 has 6 divisors (see below), whose sum is σ = 42632982. Its totient is φ = 39008552.

The previous prime is 40782191. The next prime is 40782199. The reversal of 40782197 is 79128704.

It can be written as a sum of positive squares in only one way, i.e., 29964676 + 10817521 = 5474^2 + 3289^2 .

It is not a de Polignac number, because 40782197 - 2⁸ = 40781941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40782197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40782191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38018 + ... + 39075.

It is an arithmetic number, because the mean of its divisors is an integer number (7105497).

Almost surely, 2^40782197 is an apocalyptic number.

It is an amenable number.

40782197 is a deficient number, since it is larger than the sum of its proper divisors (1850785).

40782197 is an equidigital number, since it uses as much as digits as its factorization.

40782197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77139 (or 77116 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 40782197 is about 6386.0940331317. The cubic root of 40782197 is about 344.2100444504.

The spelling of 40782197 in words is "forty million, seven hundred eighty-two thousand, one hundred ninety-seven".