40782399 has 32 divisors (see below), whose sum is σ = 64788480. Its totient is φ = 22332672.

The previous prime is 40782397. The next prime is 40782419. The reversal of 40782399 is 99328704.

It is not a de Polignac number, because 40782399 - 2¹ = 40782397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40782399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40782397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56362 + ... + 57080.

It is an arithmetic number, because the mean of its divisors is an integer number (2024640).

Almost surely, 2^40782399 is an apocalyptic number.

40782399 is a deficient number, since it is larger than the sum of its proper divisors (24006081).

40782399 is a wasteful number, since it uses less digits than its factorization.

40782399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 40782399 is about 6386.1098487264. The cubic root of 40782399 is about 344.2106127565.

The spelling of 40782399 in words is "forty million, seven hundred eighty-two thousand, three hundred ninety-nine".