40705819 has 12 divisors (see below), whose sum is σ = 51657048. Its totient is φ = 31718400.

The previous prime is 40705813. The next prime is 40705831. The reversal of 40705819 is 91850704.

It is a happy number.

It is not a de Polignac number, because 40705819 - 2⁵ = 40705787 is a prime.

It is a super-2 number, since 2×40705819² = 3313927400921522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40705813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37222 + ... + 38299.

It is an arithmetic number, because the mean of its divisors is an integer number (4304754).

Almost surely, 2^40705819 is an apocalyptic number.

40705819 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40705819 is a deficient number, since it is larger than the sum of its proper divisors (10951229).

40705819 is a wasteful number, since it uses less digits than its factorization.

40705819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75546 (or 75539 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 40705819 is about 6380.1112059274. Note that the first 3 decimals coincide. The cubic root of 40705819 is about 343.9950282092.

It can be divided in two parts, 4070 and 5819, that added together give a palindrome (9889).

The spelling of 40705819 in words is "forty million, seven hundred five thousand, eight hundred nineteen".