40081850 has 24 divisors (see below), whose sum is σ = 75299868. Its totient is φ = 15872000.

The previous prime is 40081831. The next prime is 40081871. The reversal of 40081850 is 5818004.

It can be written as a sum of positive squares in 6 ways, for example, as 36881329 + 3200521 = 6073^2 + 1789^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1082 + ... + 9018.

Almost surely, 2^40081850 is an apocalyptic number.

40081850 is a deficient number, since it is larger than the sum of its proper divisors (35218018).

40081850 is a wasteful number, since it uses less digits than its factorization.

40081850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050 (or 8045 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 40081850 is about 6331.0228241572. The cubic root of 40081850 is about 342.2282996256.

Adding to 40081850 its reverse (5818004), we get a palindrome (45899854).

The spelling of 40081850 in words is "forty million, eighty-one thousand, eight hundred fifty".