40065838 has 16 divisors (see below), whose sum is σ = 64715760. Its totient is φ = 18534016.

The previous prime is 40065803. The next prime is 40065841. The reversal of 40065838 is 83856004.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7981 + ... + 11992.

It is an arithmetic number, because the mean of its divisors is an integer number (4044735).

Almost surely, 2^40065838 is an apocalyptic number.

40065838 is a deficient number, since it is larger than the sum of its proper divisors (24649922).

40065838 is a wasteful number, since it uses less digits than its factorization.

40065838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20051.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 40065838 is about 6329.7581312401. The cubic root of 40065838 is about 342.1827221437.

The spelling of 40065838 in words is "forty million, sixty-five thousand, eight hundred thirty-eight".